Reinsurance Group of America (RGA) 10-Q 5 Aug 14 2014 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Jun. 30, 2014	Jul. 31, 2014
Document And Entitiy Information [Abstract]	'	'
Document Type	'10-Q	'
Document period end date	30-Jun-14	'
Amendment flag	'false	'
Entity registrant name	'REINSURANCE GROUP OF AMERICA INC	'
Entity central index key	'0000898174	'
Entity current reporting status	'Yes	'
Entity voluntary filers	'No	'
Current fiscal year end date	'--12-31	'
Entity filer category	'Large Accelerated Filer	'
Entity well-known seasoned issuer	'Yes	'
Common Shares Outstanding	'	68,562,030
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'

CONDENSED_CONSOLIDATED_BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fixed maturity securities:	'	'
Available-for-sale at fair value (amortized cost of $22,373,346 and $20,270,734)	$24,480,396	$21,474,136
Mortgage loans on real estate (net of allowances of $9,692 and $10,106)	2,555,800	2,486,680
Policy loans	1,250,635	1,244,469
Funds withheld at interest	5,940,521	5,771,467
Short-term investments	45,596	139,395
Other invested assets	1,128,375	1,324,960
Total investments	35,401,323	32,441,107
Cash and cash equivalents	1,378,117	923,647
Accrued investment income	279,368	267,908
Premiums receivable and other reinsurance balances	1,559,526	1,439,528
Reinsurance ceded receivables	614,203	594,515
Deferred policy acquisition costs	3,368,343	3,517,796
Other assets	570,171	489,972
Total assets	43,171,051	39,674,473
Liabilities and Stockholders’ Equity	'	'
Future policy benefits	13,785,532	11,866,776
Interest-sensitive contract liabilities	12,686,025	12,947,557
Other policy claims and benefits	3,996,737	3,571,761
Other reinsurance balances	258,023	275,138
Deferred income taxes	2,232,821	1,837,577
Other liabilities	716,157	541,035
Short-term Debt	110,000	0
Long-term debt	2,214,705	2,214,350
Collateral finance facility	482,092	484,752
Total liabilities	36,482,092	33,738,946
Commitments and contingent liabilities (See Note 8)	'	'
Stockholders’ Equity:	'	'
Preferred stock - par value $.01 per share, 10,000,000 shares authorized, no shares issued or outstanding	0	0
Common stock - par value $.01 per share, 140,000,000 shares authorized, 79,137,758 shares issued at June 30, 2014 and December 31, 2013	791	791
Additional paid-in-capital	1,783,856	1,777,906
Retained earnings	3,941,777	3,659,938
Treasury stock, at cost - 10,327,655 and 8,369,540 shares	-666,125	-508,715
Accumulated other comprehensive income	1,628,660	1,005,607
Total stockholders’ equity	6,688,959	5,935,527
Total liabilities and stockholders’ equity	$43,171,051	$39,674,473

CONDENSED_CONSOLIDATED_BALANCE1

CONDENSED CONSOLIDATED BALANCE SHEETS PARENTHETICAL (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Available for Sale at Fair value - Amortized cost	$22,373,346	$20,270,734
Preferred stock par value (per share)	$0.01	$0.01
Preferred stock shares authorized	10,000,000	10,000,000
Preferred stock shares issued	'	'
Preferred stock shares outstanding	'	'
Common stock par value (per share)	$0.01	$0.01
Common stock shares authorized	140,000,000	140,000,000
Common stock shares issued	79,137,758	79,137,758
Common stock shares outstanding	68,810,103	70,768,218
Treasury stock, shares	10,327,655	8,369,540
Allowances for Loan and Lease Losses, Real Estate	$9,692	$10,106

CONDENSED_CONSOLIDATED_STATEME

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues:	'	'	'	'
Net premiums	$2,183,160	$2,035,156	$4,283,797	$4,014,849
Investment income, net of related expenses	410,607	444,234	814,982	869,365
Investment related gains (losses), net:	'	'	'	'
Other-than-temporary impairments on fixed maturity securities	-870	-9,803	-1,173	-10,005
Other-than-temporary impairments on fixed maturity securities transferred to (from) accumulated other comprehensive income	0	-306	0	-306
Other investment related gains (losses), net	119,397	58,352	204,271	152,925
Total investment related gains (losses), net	118,527	48,243	203,098	142,614
Other revenues	120,726	63,009	188,316	164,916
Total revenues	2,833,020	2,590,642	5,490,193	5,191,744
Benefits and Expenses:	'	'	'	'
Claims and other policy benefits	1,841,885	2,030,574	3,685,562	3,719,484
Interest credited	115,962	118,345	226,556	243,828
Policy acquisition costs and other insurance expenses	409,374	370,505	764,247	727,862
Other operating expenses	127,462	113,408	238,398	232,909
Interest expense	35,211	29,918	70,295	58,404
Collateral finance facility expense	2,591	2,650	5,160	5,188
Total benefits and expenses	2,532,485	2,665,400	4,990,218	4,987,675
Income (loss) before income taxes	300,535	-74,758	499,975	204,069
Provision for income taxes	102,239	-25,146	165,015	68,146
Net income (loss)	$198,296	($49,612)	$334,960	$135,923
Earnings per share:	'	'	'	'
Basic earnings per share	$2.87	($0.69)	$4.80	$1.86
Diluted earnings per share	$2.84	($0.69)	$4.75	$1.85
Dividends declared per share	$0.30	$0.24	$0.60	$0.48

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Comprehensive income (loss)	'	'	'	'
Net income (loss)	$198,296	($49,612)	$334,960	$135,923
Other comprehensive income (loss), net of tax:	'	'	'	'
Change in foreign currency translation adjustments	42,643	-88,832	-40	-102,937
Change in net unrealized gains and losses on investments	304,997	-706,848	620,381	-826,181
Change in other-than-temporary impairment losses on fixed maturity securities	1,248	199	1,698	650
Changes in pension and other postretirement plan adjustments	273	875	1,014	1,700
Total other comprehensive income (loss), net of tax	349,161	-794,606	623,053	-926,768
Total comprehensive income (loss)	$547,457	($844,218)	$958,013	($790,845)

CONDENSED_CONSOLIDATED_STATEME1

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Cash Flows from Operating Activities:	'	'
Net income (loss)	$334,960	$135,923
Change in operating assets and liabilities:	'	'
Accrued investment income	-9,588	-35,457
Premiums receivable and other reinsurance balances	-104,002	-5,100
Deferred policy acquisition costs	165,257	104,002
Reinsurance ceded receivable balances	-27,310	64,814
Future policy benefits, other policy claims and benefits, and other reinsurance balances	581,812	806,172
Deferred income taxes	111,735	69,071
Other assets and other liabilities, net	34,577	-165,129
Amortization of net investment premiums, discounts and other	-51,521	-43,662
Investment related gains, net	-203,098	-142,614
Gain on repurchase of collateral finance facility securities	0	-46,506
Excess tax benefits from share-based payment arrangement	-1,268	-2,420
Other, net	76,256	66,027
Net cash provided by operating activities	907,810	805,121
Cash Flows from Investing Activities:	'	'
Sales of fixed maturity securities available-for-sale	2,756,942	1,898,833
Maturities of fixed maturity securities available-for-sale	239,279	62,734
Purchases of fixed maturity securities available-for-sale	-3,302,047	-2,487,016
Cash invested in mortgage loans	-266,002	-244,939
Cash invested in policy loans	-52,913	-17
Cash invested in funds withheld at interest	-39,856	-60,156
Principal payments on mortgage loans on real estate	200,601	150,098
Principal payments on policy loans	46,747	32,940
Payments to Acquire Property, Plant, and Equipment	-43,295	0
Change in short-term investments	93,798	241,136
Change in other invested assets	271,373	-1,591
Net cash used in investing activities	-95,373	-407,978
Cash Flows from Financing Activities:	'	'
Dividends to stockholders	-41,955	-35,169
Repurchase and repayment of collateral finance facility securities	0	-112,000
Repayments of Short-term Debt	110,000	120,000
Purchases of treasury stock	-179,592	-234,690
Excess tax benefits from share-based payment arrangement	1,268	2,420
Exercise of stock options, net	9,578	11,439
Change in cash collateral for derivatives and other arrangements	47,561	-31,858
Deposits on universal life and other investment type policies and contracts	51,257	39,706
Withdrawals on universal life and other investment type policies and contracts	-374,567	-397,033
Net cash used in financing activities	-376,450	-637,185
Effect of exchange rate changes on cash	18,483	-46,231
Change in cash and cash equivalents	454,470	-286,273
Cash and cash equivalents, beginning of period	923,647	1,259,892
Cash and cash equivalents, end of period	1,378,117	973,619
Supplementary information:	'	'
Cash paid for interest	67,248	58,387
Cash paid for income taxes, net of refunds	$26,732	$105,401

Business_and_Basis_of_Presenta

Business and Basis of Presentation	6 Months Ended
	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Organization and Basis of Presentation	'
	Business and Basis of Presentation
	Reinsurance Group of America, Incorporated (“RGA”) is an insurance holding company that was formed on December 31, 1992. The accompanying unaudited condensed consolidated financial statements of RGA and its subsidiaries (collectively, the “Company”) have been prepared in conformity with accounting principles generally accepted in the United States of America for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, these financial statements do not include all of the information and footnotes required by accounting principles generally accepted in the United States of America for complete financial statements. In the opinion of management, all adjustments, consisting of normal recurring accruals, considered necessary for a fair presentation have been included. Results for the six months ended June 30, 2014 are not necessarily indicative of the results that may be expected for the year ending December 31, 2014. There were no subsequent events that would require disclosure or adjustments to the accompanying condensed consolidated financial statements through the date the financial statements were issued. These unaudited condensed consolidated financial statements include the accounts of RGA and its subsidiaries, all intercompany accounts and transactions have been eliminated. The Company has reclassified the presentation of certain prior-period information to conform to the current presentation. These statements should be read in conjunction with the Company’s 2013 Annual Report on Form 10-K filed with the Securities and Exchange Commission (“SEC”) on February 27, 2014, as updated by the Company's Current Report on Form 8-K filed with the SEC on May 13, 2014 (the "2013 Annual Report").
	Effective January 1, 2014 (and as filed with the SEC in the Current Report on Form 8-K referenced above), the Company realigned certain operations and management responsibilities to better fit within its geographic-based segments. Operations in Mexico and Latin America have been moved from Europe & South Africa to the U.S. segment, which has been renamed U.S. and Latin America. Operations in India have been moved from Europe & South Africa to the Asia Pacific segment. The Europe & South Africa segment has been renamed Europe, Middle East and Africa.

Earnings_Per_Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	Earnings Per Share
	The following table sets forth the computation of basic and diluted earnings per share on net income (loss) (in thousands, except per share information):
		Three months ended June 30,					Six months ended June 30,
		2014		2013			2014		2013
	Earnings:
	Net income (loss) (numerator for basic and diluted calculations)	$	198,296	$	(49,612	)	$	334,960	$	135,923
	Shares:
	Weighted average outstanding shares (denominator for basic calculation)	69,076		72,350			69,823		73,089
	Equivalent shares from outstanding stock options	642		—			666		484
	Denominator for diluted calculation	69,718		72,350			70,489		73,573
	Earnings per share:
	Basic	$	2.87	$	(0.69	)	$	4.8	$	1.86
	Diluted	$	2.84	$	(0.69	)	$	4.75	$	1.85
	As a result of the net loss for the three months ended June 30, 2013, the Company was required to use basic weighted average common shares outstanding in the calculation of diluted loss per share, since the inclusion of shares for outstanding stock options of 0.4 million would have been antidilutive to the earnings (loss) per share calculations. In the absence of the losses, weighted average common shares outstanding and dilutive potential common shares would have totaled 72.8 million.
	The calculation of common equivalent shares does not include the impact of options having a strike or conversion price that exceeds the average stock price for the earnings period, as the result would be antidilutive. The calculation of common equivalent shares also excludes the impact of outstanding performance contingent shares, as the conditions necessary for their issuance have not been satisfied as of the end of the reporting period. For the three months ended June 30, 2014, 0.3 million stock options and approximately 0.8 million performance contingent shares were excluded from the calculation. For the six months ended June 30, 2013, no stock options and approximately 0.7 million performance contingent shares were excluded from the calculation. Year-to-date amounts for equivalent shares from outstanding stock options and performance contingent shares are the weighted average of the individual quarterly amounts.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income	6 Months Ended
	Jun. 30, 2014
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]	'
Accumulated Other Comprehensive Income	'
	Accumulated Other Comprehensive Income
	The balance of and changes in each component of accumulated other comprehensive income (loss) (“AOCI”) for the six months ended June 30, 2014 and 2013 are as follows (dollars in thousands):
			Accumulated Other Comprehensive Income (Loss), Net of Income Tax
			Accumulated			Unrealized			Pension and				Total
			Currency			Appreciation			Postretirement
			Translation			(Depreciation)			Benefits
			Adjustments			of Investments(1)
	Balance, December 31, 2013		$	207,083		$	820,245		$	(21,721	)		$	1,005,607
	Other comprehensive income (loss) before reclassifications		(40		)	646,777			(6		)		646,731
	Amounts reclassified to (from) AOCI		—			(24,698		)	1,020				(23,678		)
	Net current-period other comprehensive income (loss)		(40		)	622,079			1,014				623,053
	Balance, June 30, 2014		$	207,043		$	1,442,324		$	(20,707	)		$	1,628,660
			Accumulated Other Comprehensive Income (Loss), Net of Income Tax
			Accumulated			Unrealized			Pension and				Total
			Currency			Appreciation			Postretirement
			Translation			(Depreciation)			Benefits
			Adjustments			of Investments(1)
	Balance, December 31, 2012		$	267,475		$	1,877,657		$	(36,230	)		$	2,108,902
	Other comprehensive income (loss) before reclassifications		(102,937		)	(819,019		)	206				(921,750		)
	Amounts reclassified to (from) AOCI		—			(6,512		)	1,494				(5,018		)
	Net current-period other comprehensive income (loss)		(102,937		)	(825,531		)	1,700				(926,768		)
	Balance, June 30, 2013		$	164,538		$	1,052,126		$	(34,530	)		$	1,182,134
	-1	Includes cash flow hedges. See Note 5 - “Derivative Instruments” for additional information on cash flow hedges.
	The following table presents the amounts of AOCI reclassifications for the three and six months ended June 30, 2014 and 2013 (dollars in thousands):
			Amount Reclassified from AOCI
			Three months ended June 30,							Six months ended June 30,
	Details about AOCI Components		2014			2013				2014				2013			Affected Line Item in Statement of Income
	Unrealized gains and losses on available-for-sale securities		$	27,142		$	13,510			$	28,331			$	23,858		Investment related gains (losses), net
	Gains and losses on cash flow hedge - interest rate swap		321			201				539				506			Investment income
	Deferred policy acquisition costs attributed to unrealized gains and losses(1)		4,370			(13,283		)		8,791				(14,831		)
	Total		31,833			428				37,661				9,533
	Provision for income taxes		(11,059		)	(87		)		(12,963		)		(3,021		)
	Net unrealized gains (losses), net of tax		$	20,774		$	341			$	24,698			$	6,512
	Amortization of unrealized pension and postretirement benefits:
	Prior service cost(2)		$	(216	)	$	(213	)		$	(218	)		$	(307	)
	Actuarial gains/(losses)(2)		(462		)	(968		)		(1,352		)		(1,991		)
	Total		(678		)	(1,181		)		(1,570		)		(2,298		)
	Provision for income taxes		238			413				550				804
	Amortization of unrealized pension and postretirement benefits, net of tax		$	(440	)	$	(768	)		$	(1,020	)		$	(1,494	)
	Total reclassifications, net of tax		$	20,334		$	(427	)		$	23,678			$	5,018
	-1	This AOCI component is included in the computation of the deferred policy acquisition cost. See Note 8 – “Deferred Policy Acquisition Costs” of the 2013 Annual Report for additional details.
	-2	These AOCI components are included in the computation of the net periodic pension cost. See Note 9 – “Employee Benefit Plans” for additional details

Investments

Investments	6 Months Ended
	Jun. 30, 2014
Investments [Abstract]	'
Investments	'
	Investments
	Fixed Maturity and Equity Securities Available-for-Sale
	The following tables provide information relating to investments in fixed maturity and equity securities by sector as of June 30, 2014 and December 31, 2013 (dollars in thousands):
	June 30, 2014:		Amortized				Unrealized				Unrealized				Estimated Fair			% of		Other-than-
																				temporary impairments
			Cost				Gains				Losses				Value			Total		in AOCI
	Available-for-sale:
	Corporate securities		$	13,280,721			$	932,793			$	62,103			$	14,151,411		57.8	%	$	—
	Canadian and Canadian provincial governments		2,786,873				964,710				3,945				3,747,638			15.3		—
	Residential mortgage-backed securities		946,431				49,676				9,968				986,139			4.1		(300		)
	Asset-backed securities		993,116				24,314				9,055				1,008,375			4.1		354
	Commercial mortgage-backed securities		1,380,622				103,032				9,034				1,474,620			6		(1,609		)
	U.S. government and agencies		429,215				20,987				1,696				448,506			1.8		—
	State and political subdivisions		369,515				42,553				4,581				407,487			1.7		—
	Other foreign government, supranational and foreign government-sponsored enterprises		2,186,853				78,730				9,363				2,256,220			9.2		—
	Total fixed maturity securities		$	22,373,346			$	2,216,795			$	109,745			$	24,480,396		100	%	$	(1,555	)
	Non-redeemable preferred stock		$	81,240			$	7,165			$	1,567			$	86,838		61.7	%
	Other equity securities		53,833				1,063				990				53,906			38.3
	Total equity securities		$	135,073			$	8,228			$	2,557			$	140,744		100	%
	December 31, 2013:		Amortized				Unrealized				Unrealized				Estimated Fair			% of		Other-than-
																				temporary impairments
			Cost				Gains				Losses				Value			Total		in AOCI
	Available-for-sale:
	Corporate securities		$	11,697,394			$	616,147			$	202,786			$	12,110,755		56.4	%	$	—
	Canadian and Canadian provincial governments		2,728,111				669,762				16,848				3,381,025			15.7		—
	Residential mortgage-backed securities		970,434				38,126				18,917				989,643			4.6		(300		)
	Asset-backed securities		891,751				18,893				15,812				894,832			4.2		(2,259		)
	Commercial mortgage-backed securities		1,314,782				91,651				17,487				1,388,946			6.5		(1,609		)
	U.S. government and agencies		489,631				16,468				4,748				501,351			2.3		—
	State and political subdivisions		313,252				21,907				14,339				320,820			1.5		—
	Other foreign government, supranational and foreign government-sponsored enterprises		1,865,379				45,347				23,962				1,886,764			8.8		—
	Total fixed maturity securities		$	20,270,734			$	1,518,301			$	314,899			$	21,474,136		100	%	$	(4,168	)
	Non-redeemable preferred stock		$	81,993			$	5,342			$	5,481			$	81,854		20.2	%
	Other equity securities		327,479				618				4,220				323,877			79.8
	Total equity securities		$	409,472			$	5,960			$	9,701			$	405,731		100	%
	The Company enters into various collateral arrangements that require both the pledging and acceptance of fixed maturity securities as collateral. The Company pledged fixed maturity securities as collateral to derivative and reinsurance counterparties with an amortized cost of $70.0 million and $57.2 million, and an estimated fair value of $71.8 million and $58.0 million, as of June 30, 2014 and December 31, 2013 respectively. The pledged fixed maturity securities are included in fixed maturity securities, available-for-sale in the condensed consolidated balance sheets. Securities with an amortized cost of $9,600.7 million and $7,842.9 million, and an estimated fair value of $10,188.1 million and $8,125.4 million, as of June 30, 2014 and December 31, 2013, respectively, were held in trust to satisfy collateral requirements under certain third-party reinsurance treaties.
	The Company received fixed maturity securities as collateral from derivative and reinsurance counterparties with an estimated fair value of $111.8 million and $94.1 million, as of June 30, 2014 and December 31, 2013, respectively. The collateral is held in separate custodial accounts and is not recorded on the Company’s condensed consolidated balance sheets. Subject to certain constraints, the Company is permitted by contract to sell or re-pledge this collateral; however, as of June 30, 2014 and December 31, 2013, none of the collateral had been sold or re-pledged.
	As of June 30, 2014, the Company held securities with a fair value of $1,336.5 million that were guaranteed or issued by the Canadian province of Ontario and $1,553.8 million that were guaranteed or issued by the Canadian province of Quebec, both of which exceeded 10% of total stockholders’ equity. As of December 31, 2013, the Company held securities with a fair value of $1,222.3 million that were guaranteed or issued by the Canadian province of Ontario and $1,389.1 million that were guaranteed or issued by the Canadian province of Quebec, both of which exceeded 10% of total stockholders’ equity.
	The amortized cost and estimated fair value of fixed maturity securities available-for-sale at June 30, 2014 are shown by contractual maturity in the table below (dollars in thousands). Actual maturities can differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Asset and mortgage-backed securities are shown separately in the table below, as they are not due at a single maturity date.
			Amortized				Fair
			Cost				Value
	Available-for-sale:
	Due in one year or less		$	637,052			$	644,928
	Due after one year through five years		4,116,731				4,358,370
	Due after five years through ten years		7,415,405				7,871,893
	Due after ten years		6,883,989				8,136,071
	Asset and mortgage-backed securities		3,320,169				3,469,134
	Total		$	22,373,346			$	24,480,396
	Corporate Fixed Maturity Securities
	The tables below show the major industry types of the Company’s corporate fixed maturity holdings as of June 30, 2014 and December 31, 2013 (dollars in thousands):
	June 30, 2014:						Estimated
			Amortized Cost				Fair Value				% of Total
	Finance		$	4,512,831			$	4,788,259			33.8	%
	Industrial		7,240,086				7,729,309				54.6
	Utility		1,516,641				1,622,357				11.5
	Other		11,163				11,486				0.1
	Total		$	13,280,721			$	14,151,411			100	%
	December 31, 2013:						Estimated
			Amortized Cost				Fair Value				% of Total
	Finance		$	3,838,716			$	3,983,623			32.9	%
	Industrial		6,607,100				6,824,063				56.3
	Utility		1,240,353				1,292,305				10.7
	Other		11,225				10,764				0.1
Total		$	11,697,394			$	12,110,755			100	%
Other-Than-Temporary Impairments - Fixed Maturity and Equity Securities
As discussed in Note 2 – “Summary of Significant Accounting Policies” of the 2013 Annual Report, a portion of certain other-than-temporary impairment (“OTTI”) losses on fixed maturity securities are recognized in AOCI. For these securities the net amount recognized in the condensed consolidated statements of income (“credit loss impairments”) represents the difference between the amortized cost of the security and the net present value of its projected future cash flows discounted at the effective interest rate implicit in the debt security prior to impairment. Any remaining difference between the fair value and amortized cost is recognized in AOCI. The following table sets forth the amount of pre-tax credit loss impairments on fixed maturity securities held by the Company as of the dates indicated, for which a portion of the OTTI loss was recognized in AOCI, and the corresponding changes in such amounts (dollars in thousands):
		Three months ended June 30,
		2014				2013
Balance, beginning of period		$	11,696			$	14,773
Credit loss OTTI previously recognized on securities impaired to fair value during the period		—				(1,449		)
Credit loss OTTI previously recognized on securities which matured, paid down, prepaid or were sold during the period		(4,412		)		—
Balance, end of period		$	7,284			$	13,324
		Six months ended June 30,
		2014				2013
Balance, beginning of period		$	11,696			$	16,675
Credit loss OTTI previously recognized on securities impaired to fair value during the period		—				(1,449		)
Credit loss OTTI previously recognized on securities which matured, paid down, prepaid or were sold during the period		(4,412		)		(1,902		)
Balance, end of period		$	7,284			$	13,324
Purchased Credit Impaired Fixed Maturity Securities Available-for-Sale
Securities acquired with evidence of credit quality deterioration since origination and for which it is probable at the acquisition date that the Company will be unable to collect all contractually required payments are classified as purchased credit impaired securities. For each security, the excess of the cash flows expected to be collected as of the acquisition date over its acquisition date fair value is referred to as the accretable yield and is recognized as net investment income on an effective yield basis. At the date of acquisition, the timing and amount of the cash flows expected to be collected was determined based on a best estimate using key assumptions, such as interest rates, default rates and prepayment speeds. If subsequently, based on current information and events, it is probable that there is a significant increase in cash flows previously expected to be collected or if actual cash flows are significantly greater than cash flows previously expected to be collected, the accretable yield is adjusted prospectively. The excess of the contractually required payments (including interest) as of the acquisition date over the cash flows expected to be collected as of the acquisition date is referred to as the nonaccretable difference, and this amount is not expected to be realized as net investment income. Decreases in cash flows expected to be collected can result in OTTI.
The following tables present information on the Company’s purchased credit impaired securities, which are included in fixed maturity securities available-for-sale (dollars in thousands):
		30-Jun-14				31-Dec-13
Outstanding principal and interest balance(1)		$	213,901			$	192,644
Carrying value, including accrued interest(2)		175,604				148,822
-1	Represents the contractually required payments which is the sum of contractual principal, whether or not currently due, and accrued interest.
-2	Estimated fair value plus accrued interest.
The following table presents information about purchased credit impaired investments acquired during the periods, as of the acquisition dates (dollars in thousands):
	Six months ended June 30,
	2014				2013
Contractually required payments (including interest)	$	55,671			$	109,931
Cash flows expected to be collected(1)	44,799				88,422
Fair value of investments acquired	31,544				58,471
-1	Represents undiscounted principal and interest cash flow expectations at the date of acquisition.
The following table presents activity for the accretable yield on purchased credit impaired securities for the three and six months ended June 30, 2014 and 2013 (dollars in thousands):
	Three months ended June 30,								Six months ended June 30,
	2014				2013				2014				2013
Balance, beginning of period	$	73,367			$	59,915			$	69,469			$	39,239
Investments purchased	5,684				7,885				13,255				29,951
Accretion	(2,357		)		(1,879		)		(4,496		)		(3,822		)
Disposals	—				(832		)		(379		)		(832		)
Reclassification from nonaccretable difference	(13,477		)		1,180				(14,632		)		1,733
Balance, end of period	$	63,217			$	66,269			$	63,217			$	66,269
Unrealized Losses for Fixed Maturity and Equity Securities Available-for-Sale
The following table presents the total gross unrealized losses for the 939 and 1,396 fixed maturity and equity securities as of June 30, 2014 and December 31, 2013, respectively, where the estimated fair value had declined and remained below amortized cost by the indicated amount (dollars in thousands):
		30-Jun-14							31-Dec-13
		Gross				% of Total			Gross				% of Total
		Unrealized							Unrealized
		Losses							Losses
Less than 20%		$	98,885			88.1	%		$	296,731			91.4	%
20% or more for less than six months		2,479				2.2			6,444				2
20% or more for six months or greater		10,938				9.7			21,425				6.6
Total		$	112,302			100	%		$	324,600			100	%
The Company’s determination of whether a decline in value is other-than-temporary includes analysis of the underlying credit and the extent and duration of a decline in value. The Company’s credit analysis of an investment includes determining whether the issuer is current on its contractual payments, evaluating whether it is probable that the Company will be able to collect all amounts due according to the contractual terms of the security and analyzing the overall ability of the Company to recover the amortized cost of the investment. In the Company’s impairment review process, the duration and severity of an unrealized loss position for equity securities are given greater weight and consideration given the lack of contractual cash flows or deferability features.
The following tables present the estimated fair values and gross unrealized losses, including other-than-temporary impairment losses reported in AOCI, for 939 and 1,396 fixed maturity and equity securities that have estimated fair values below amortized cost as of June 30, 2014 and December 31, 2013, respectively (dollars in thousands). These investments are presented by class and grade of security, as well as the length of time the related fair value has remained below amortized cost.
		Less than 12 months								12 months or greater							Total
						Gross								Gross						Gross
June 30, 2014:		Estimated				Unrealized				Estimated				Unrealized			Estimated			Unrealized
		Fair Value				Losses				Fair Value				Losses			Fair Value			Losses
Investment grade securities:
Corporate securities		$	1,624,031			$	21,638			$	1,062,513			$	36,925		$	2,686,544		$	58,563
Canadian and Canadian provincial governments		20,728				413				74,864				3,532			95,592			3,945
Residential mortgage-backed securities		74,009				2,365				122,444				7,337			196,453			9,702
Asset-backed securities		133,606				1,137				130,015				5,083			263,621			6,220
Commercial mortgage-backed securities		28,099				206				39,222				4,191			67,321			4,397
U.S. government and agencies		10,819				9				75,730				1,687			86,549			1,696
State and political subdivisions		13,426				600				45,879				3,981			59,305			4,581
Other foreign government, supranational and foreign government-sponsored enterprises		367,176				2,339				187,073				7,023			554,249			9,362
Total investment grade securities		2,271,894				28,707				1,737,740				69,759			4,009,634			98,466
Non-investment grade securities:
Corporate securities		165,552				2,181				19,206				1,359			184,758			3,540
Residential mortgage-backed securities		16,411				137				3,576				129			19,987			266
Asset-backed securities		11,334				183				10,747				2,652			22,081			2,835
Commercial mortgage-backed securities		—				—				6,406				4,637			6,406			4,637
Other foreign government, supranational and foreign government-sponsored enterprises		2,261				1				—				—			2,261			1
Total non-investment grade securities		195,558				2,502				39,935				8,777			235,493			11,279
Total fixed maturity securities		$	2,467,452			$	31,209			$	1,777,675			$	78,536		$	4,245,127		$	109,745
Non-redeemable preferred stock		$	6,705			$	487			$	14,902			$	1,080		$	21,607		$	1,567
Other equity securities		—				—				32,463				990			32,463			990
Total equity securities		$	6,705			$	487			$	47,365			$	2,070		$	54,070		$	2,557
		Less than 12 months								12 months or greater							Total
						Gross								Gross						Gross
December 31, 2013:		Estimated				Unrealized				Estimated				Unrealized			Estimated			Unrealized
		Fair Value				Losses				Fair Value				Losses			Fair Value			Losses
Investment grade securities:
Corporate securities		$	3,141,179			$	148,895			$	301,303			$	40,548		$	3,442,482		$	189,443
Canadian and Canadian provincial governments		188,491				14,419				12,029				2,429			200,520			16,848
Residential mortgage-backed securities		283,967				15,900				23,068				1,688			307,035			17,588
Asset-backed securities		255,656				4,916				56,668				4,983			312,324			9,899
Commercial mortgage-backed securities		219,110				3,725				20,068				5,745			239,178			9,470
U.S. government and agencies		133,697				4,469				4,406				279			138,103			4,748
State and political subdivisions		120,193				9,723				15,202				4,616			135,395			14,339
Other foreign government, supranational and foreign government-sponsored enterprises		665,313				21,075				36,212				2,847			701,525			23,922
Total investment grade securities		5,007,606				223,122				468,956				63,135			5,476,562			286,257
Non-investment grade securities:
Corporate securities		283,603				9,451				38,256				3,892			321,859			13,343
Residential mortgage-backed securities		62,146				1,075				3,945				254			66,091			1,329
Asset-backed securities		28,670				415				32,392				5,498			61,062			5,913
Commercial mortgage-backed securities		15,762				81				10,980				7,936			26,742			8,017
Other foreign government, supranational and foreign government-sponsored enterprises		9,403				40				—				—			9,403			40
Total non-investment grade securities		399,584				11,062				85,573				17,580			485,157			28,642
Total fixed maturity securities		$	5,407,190			$	234,184			$	554,529			$	80,715		$	5,961,719		$	314,899
Non-redeemable preferred stock		$	51,386			$	5,479			$	1			$	2		$	51,387		$	5,481
Other equity securities		218,834				1,748				32,550				2,472			251,384			4,220
Total equity securities		$	270,220			$	7,227			$	32,551			$	2,474		$	302,771		$	9,701
As of June 30, 2014, the Company does not intend to sell these fixed maturity securities and does not believe it is more likely than not that it will be required to sell these fixed maturity securities before the recovery of the fair value up to the current amortized cost of the investment, which may be maturity. As of June 30, 2014, the Company has the ability and intent to hold the equity securities until the recovery of the fair value up to the current cost of the investment. However, unforeseen facts and circumstances may cause the Company to sell fixed maturity and equity securities in the ordinary course of managing its portfolio to meet certain diversification, credit quality, asset-liability management and liquidity guidelines.
Unrealized losses on non-investment grade securities as of June 30, 2014 are primarily related to high-yield corporate securities and commercial mortgage-backed securities. Unrealized losses decreased across all security types as interest rates decreased during the first six months of 2014.
Investment Income, Net of Related Expenses
Major categories of investment income, net of related expenses, consist of the following (dollars in thousands):
		Three months ended June 30,								Six months ended June 30,
		2014				2013				2014				2013
Fixed maturity securities available-for-sale		$	253,456			$	240,590			$	497,418			$	479,834
Mortgage loans on real estate		30,373				28,362				63,465				56,605
Policy loans		13,751				15,450				27,189				33,360
Funds withheld at interest		108,059				159,212				220,798				296,471
Short-term investments		80				422				1,045				1,235
Other invested assets		19,021				13,379				33,522				27,301
Investment income		424,740				457,415				843,437				894,806
Investment expense		(14,133		)		(13,181		)		(28,455		)		(25,441		)
Investment income, net of related expenses		$	410,607			$	444,234			$	814,982			$	869,365
Investment Related Gains (Losses), Net
Investment related gains (losses), net consist of the following (dollars in thousands):
	Three months ended June 30,								Six months ended June 30,
	2014				2013				2014				2013
Fixed maturities and equity securities available for sale:
Other-than-temporary impairment losses on fixed maturities	$	(870	)		$	(9,803	)		$	(1,173	)		$	(10,005	)
Portion of loss recognized in accumulated other comprehensive income (before taxes)	—				(306		)		—				(306		)
Net other-than-temporary impairment losses on fixed maturity securities recognized in earnings	(870		)		(10,109		)		(1,173		)		(10,311		)
Impairment losses on equity securities	—				—				—				—
Gain on investment activity	34,887				26,845				42,954				48,525
Loss on investment activity	(6,877		)		(6,760		)		(13,460		)		(17,972		)
Other impairment losses and change in mortgage loan provision	(5,309		)		125				(3,645		)		(1,501		)
Derivatives and other, net	96,696				38,142				178,422				123,873
Total investment related gains (losses), net	$	118,527			$	48,243			$	203,098			$	142,614
During the three months ended June 30, 2014 and 2013, the Company sold fixed maturity and equity securities with fair values of $222.8 million and $257.6 million at losses of $6.9 million and $6.8 million, respectively. During the six months ended June 30, 2014 and 2013, the Company sold fixed maturity and equity securities with fair values of $457.9 million and $461.9 million at losses of $13.5 million and $18.0 million, respectively. The Company generally does not engage in short-term buying and selling of securities.
Securities Borrowing and Other
The Company participates in a securities borrowing program whereby securities, which are not reflected on the Company’s condensed consolidated balance sheets, are borrowed from a third party. The Company is required to maintain a minimum of 100% of the fair value of the borrowed securities as collateral, which consists of rights to reinsurance treaty cash flows. The Company had borrowed securities with an amortized cost of $187.7 million and $93.0 million, and an estimated fair value of $191.1 million and $93.0 million, as of June 30, 2014 and December 31, 2013, respectively. The borrowed securities are used to provide collateral under an affiliated reinsurance transaction.
The Company also participates in a repurchase/reverse repurchase program in which securities, reflected as investments on the Company’s condensed consolidated balance sheets, are pledged to a third party. In return, the Company receives securities from the third party with an estimated fair value equal to a minimum of 100% of the securities pledged. The securities received are not reflected on the Company’s condensed consolidated balance sheets. As of June 30, 2014 the Company had pledged securities with an amortized cost of $300.7 million and an estimated fair value of $315.2 million, in return the Company received securities with an estimated fair value of $354.9 million. As of December 31, 2013 the Company had pledged securities with an amortized cost of $300.3 million and an estimated fair value of $310.8 million, in return the Company received securities with an estimated fair value of $344.2 million.
Mortgage Loans on Real Estate
Mortgage loans represented approximately 7.2% and 7.7% of the Company’s total investments as of June 30, 2014 and December 31, 2013. The Company makes mortgage loans on income producing properties, such as apartments, retail and office buildings, light warehouses and light industrial facilities. Loan-to-value ratios at the time of loan approval are 75% or less. The distribution of mortgage loans, gross of valuation allowances, by property type is as follows as of June 30, 2014 and December 31, 2013 (dollars in thousands):
		30-Jun-14							31-Dec-13
		Recorded				% of Total			Recorded				% of Total
		Investment							Investment
Apartment		$	358,152			14	%		$	289,394			11.6	%
Retail		740,374				28.9			748,731				30
Office building		910,375				35.5			917,284				36.7
Industrial		437,605				17			439,890				17.6
Other commercial		118,986				4.6			101,487				4.1
Total		$	2,565,492			100	%		$	2,496,786			100	%
As of June 30, 2014 and December 31, 2013, the Company’s mortgage loans, gross of valuation allowances, were distributed throughout the United States as follows (dollars in thousands):
		30-Jun-14							31-Dec-13
		Recorded				% of Total			Recorded				% of Total
		Investment							Investment
Pacific		$	700,541			27.3	%		$	671,822			26.9	%
South Atlantic		504,450				19.7			543,658				21.8
Mountain		420,661				16.4			334,446				13.4
Middle Atlantic		245,746				9.6			266,802				10.7
West North Central		171,018				6.7			138,442				5.5
East North Central		232,235				9			236,766				9.5
West South Central		159,300				6.2			168,246				6.7
East South Central		58,986				2.3			59,625				2.4
New England		72,555				2.8			76,979				3.1
Total		$	2,565,492			100	%		$	2,496,786			100	%
The maturities of the mortgage loans, gross of valuation allowances, as of June 30, 2014 and December 31, 2013 are as follows (dollars in thousands):
		30-Jun-14							31-Dec-13
		Recorded				% of Total			Recorded				% of Total
		Investment							Investment
Due within five years		$	899,909			35.1	%		$	987,109			39.5	%
Due after five years through ten years		1,088,987				42.4			984,289				39.4
Due after ten years		576,596				22.5			525,388				21.1
Total		$	2,565,492			100	%		$	2,496,786			100	%
Information regarding the Company’s credit quality indicators, as determined by the Company's internal evaluation methodology for its recorded investment in mortgage loans, gross of valuation allowances, as of June 30, 2014 and December 31, 2013 is as follows (dollars in thousands):
		30-Jun-14							31-Dec-13
Internal credit quality grade:		Recorded				% of Total			Recorded				% of Total
		Investment							Investment
High investment grade		$	1,349,486			52.6	%		$	1,437,244			57.5	%
Investment grade		1,026,129				40			827,993				33.2
Average		134,736				5.3			155,914				6.2
Watch list		26,597				1			49,404				2
In or near default		28,544				1.1			26,231				1.1
Total		$	2,565,492			100	%		$	2,496,786			100	%
The age analysis of the Company’s past due recorded investment in mortgage loans, gross of valuation allowances, as of June 30, 2014 and December 31, 2013 is as follows (dollars in thousands):
		30-Jun-14				31-Dec-13
		$	—			$	—
31-60 days past due
		—				—
61-90 days past due
		7,087				—
Greater than 90 days
		7,087				—
Total past due
		2,558,405				2,496,786
Current
		$	2,565,492			$	2,496,786
Total
The following table presents the recorded investment in mortgage loans, by method of measuring impairment, and the related valuation allowances as of June 30, 2014 and December 31, 2013 (dollars in thousands):
		30-Jun-14				31-Dec-13
Mortgage loans:
Individually measured for impairment		$	28,544			$	37,841
Collectively measured for impairment		2,536,948				2,458,945
Mortgage loans, gross of valuation allowances		2,565,492				2,496,786
Valuation allowances:
Individually measured for impairment		3,714				3,211
Collectively measured for impairment		5,978				6,895
Total valuation allowances		9,692				10,106
		$	2,555,800			$	2,486,680
Mortgage loans, net of valuation allowances
Information regarding the Company’s loan valuation allowances for mortgage loans for the three months ended June 30, 2014 and 2013 is as follows (dollars in thousands):
		Three months ended June 30,
		2014				2013
Balance, beginning of period		$	8,466			$	9,924
Charge-offs		—				(1,296		)
Provision (release)		1,226				(725		)
Balance, end of period		$	9,692			$	7,903
		Six months ended June 30,
		2014				2013
Balance, beginning of period		$	10,106			$	11,580
Recoveries		24				—
Charge-offs		—				(2,148		)
Provision (release)		(438		)		(1,529		)
Balance, end of period		$	9,692			$	7,903
Information regarding the portion of the Company’s mortgage loans that were impaired as of June 30, 2014 and December 31, 2013 is as follows (dollars in thousands):
		Unpaid				Recorded				Related				Carrying
		Principal				Investment				Allowance				Value
		Balance
June 30, 2014:
Impaired mortgage loans with no valuation allowance recorded		$	9,773			$	9,170			$	—			$	9,170
Impaired mortgage loans with valuation allowance recorded		19,346				19,374				3,714				15,660
Total impaired mortgage loans		$	29,119			$	28,544			$	3,714			$	24,830
December 31, 2013:
Impaired mortgage loans with no valuation allowance recorded		$	21,698			$	21,100			$	—			$	21,100
Impaired mortgage loans with valuation allowance recorded		16,772				16,741				3,211				13,530
Total impaired mortgage loans		$	38,470			$	37,841			$	3,211			$	34,630
The Company’s average investment in impaired mortgage loans and the related interest income are reflected in the table below for the periods indicated (dollars in thousands):
		Three months ended June 30,
		2014								2013
		Average				Interest				Average				Interest
		Recorded				Income				Recorded				Income
		Investment(1)								Investment(1)
Impaired mortgage loans with no valuation allowance recorded		$	14,589			$	71			$	15,181			$	49
		15,855				259				24,211				294
Impaired mortgage loans with valuation allowance recorded
Total		$	30,444			$	330			$	39,392			$	343
		Six months ended June 30,
		2014								2013
		Average				Interest				Average				Interest
		Recorded				Income				Recorded				Income
		Investment(1)								Investment(1)
Impaired mortgage loans with no valuation allowance recorded		$	16,759			$	389			$	14,286			$	184
		16,151				452				25,294				534
Impaired mortgage loans with valuation allowance recorded
Total		$	32,910			$	841			$	39,580			$	718
(1) Average recorded investment represents the average loan balances as of the beginning of period and all subsequent quarterly end of period balances.
The Company did not acquire any impaired mortgage loans during the six months ended June 30, 2014 and 2013. The Company had $7.1 million of mortgage loans, gross of valuation allowances, that were on nonaccrual status at June 30, 2014. The Company had no mortgage loans that were on a nonaccrual status at December 31, 2013.
Policy Loans
Policy loans comprised approximately 3.5% and 3.8% of the Company’s total investments as of June 30, 2014 and December 31, 2013, respectively, substantially all of which are associated with one client. These policy loans present no credit risk because the amount of the loan cannot exceed the obligation due to the ceding company upon the death of the insured or surrender of the underlying policy. The provisions of the treaties in force and the underlying policies determine the policy loan interest rates. As policy loans represent premature distributions of policy liabilities, they have the effect of reducing future disintermediation risk. In addition, the Company earns a spread between the interest rate earned on policy loans and the interest rate credited to corresponding liabilities.
Funds Withheld at Interest
Funds withheld at interest comprised approximately 16.8% and 17.8% of the Company’s total investments as of June 30, 2014 and December 31, 2013, respectively. Of the $5.9 billion funds withheld at interest balance, net of embedded derivatives, as of June 30, 2014, $4.2 billion of the balance is associated with one client. For reinsurance agreements written on a modified coinsurance basis and certain agreements written on a coinsurance funds withheld basis, assets equal to the net statutory reserves are withheld and legally owned and managed by the ceding company and are reflected as funds withheld at interest on the Company’s condensed consolidated balance sheets. In the event of a ceding company’s insolvency, the Company would need to assert a claim on the assets supporting its reserve liabilities. However, the risk of loss to the Company is mitigated by its ability to offset amounts it owes the ceding company for claims or allowances with amounts owed to the Company from the ceding company. The Company is subject to the investment performance on the withheld assets, although it does not directly control them. These assets are primarily fixed maturity investment securities and pose risks similar to the fixed maturity securities the Company owns. To mitigate this risk, the Company helps set the investment guidelines followed by the ceding company and monitors compliance.
Other Invested Assets
Other invested assets include equity securities, limited partnership interests, real estate joint ventures, structured loans, derivative contracts, fair value option ("FVO") contractholder-directed unit-linked investments, Federal Home Loan Bank of Des Moines ("FHLB") common stock (included in other), and real estate held-for-investment (included in other). The fair value option was elected for contractholder-directed investments supporting unit-linked variable annuity type liabilities which do not qualify for presentation and reporting as separate accounts. Other invested assets represented approximately 3.2% and 4.1% of the Company’s total investments as of June 30, 2014 and December 31, 2013, respectively. Carrying values of these assets as of June 30, 2014 and December 31, 2013 are as follows (dollars in thousands):
		30-Jun-14				31-Dec-13
Equity securities		$	140,744			$	405,731
Limited partnerships and real estate joint ventures		425,100				411,456
Structured loans		193,462				223,549
Derivatives		135,771				75,227
FVO contractholder-directed unit-linked investments		151,726				138,892
Other		81,572				70,105
Total other invested assets		$	1,128,375			$	1,324,960
Investments Transferred to the Company
During the six months ended June 30, 2014 the Company executed reinsurance transactions that resulted in the transfer of securities with an estimated fair value of $1,580.1 million at the date of transfer. The securities transferred to the Company are considered non-cash transactions in the condensed consolidated statement of cash flows.

Derivative_Instruments

Derivative Instruments	6 Months Ended
	Jun. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivative Instruments	'
	Derivative Instruments
	Derivatives, except embedded derivatives, are carried on the Company’s condensed consolidated balance sheets in other invested assets or other liabilities, at fair value. Embedded derivative liabilities on modified coinsurance or funds withheld arrangements are included on the condensed consolidated balance sheets with the host contract in funds withheld at interest, at fair value. Embedded derivative liabilities on indexed annuity and variable annuity products are included on the condensed consolidated balance sheets with the host contract in interest-sensitive contract liabilities, at fair value. The following table presents the notional amounts and gross fair value of derivative instruments prior to taking into account the netting effects of master netting agreements as of June 30, 2014 and December 31, 2013 (dollars in thousands):
			30-Jun-14											31-Dec-13
			Notional				Carrying Value/Fair Value							Notional				Carrying Value/Fair Value
			Amount				Assets				Liabilities			Amount				Assets				Liabilities
	Derivatives not designated as hedging instruments:
	Interest rate swaps		$	1,314,868			$	62,348			$	7,413		$	1,592,943			$	32,555			$	21,873
	Interest rate options		240,000				5,840				—			240,000				2,554				—
	Financial futures		231,297				—				—			123,780				—				—
	Foreign currency forwards		94,003				313				7,992			79,618				—				12,772
	Consumer price index swaps		63,390				69				—			59,922				—				309
	Credit default swaps		723,700				12,390				1,624			682,700				10,438				2,156
	Equity options		598,564				39,948				—			757,352				33,902				—
	Synthetic guaranteed investment contracts		5,192,798				—				—			4,629,859				—				—
	Embedded derivatives in:
	Modified coinsurance or funds withheld arrangements		—				—				20,194			—				—				176,270
	Indexed annuity products		—				—				881,337			—				—				838,670
	Variable annuity products		—				—				58,899			—				—				30,055
	Total non-hedging derivatives		8,458,620				120,908				977,459			8,166,174				79,449				1,082,105
	Derivatives designated as hedging instruments:
	Interest rate swaps		109,918				1,537				1,108			49,131				—				4,606
	Foreign currency swaps		682,206				23,059				—			728,674				21,903				620
	Total hedging derivatives		792,124				24,596				1,108			777,805				21,903				5,226
	Total derivatives		$	9,250,744			$	145,504			$	978,567		$	8,943,979			$	101,352			$	1,087,331
	Netting Arrangements
	Certain of the Company’s derivatives are subject to enforceable master netting arrangements and reported as a net asset or liability in the condensed consolidated balance sheets. The Company nets all derivatives that are subject to such arrangements.
	The Company has elected to include all derivatives, except embedded derivatives, in the tables below, irrespective of whether they are subject to an enforceable master netting arrangement or a similar agreement. See Note 4 – "Investments" for information regarding the Company’s securities borrowing and repurchase/reverse repurchase programs. See “Embedded Derivatives” below for information regarding the Company’s bifurcated embedded derivatives.
	The following table provides information relating to the Company’s derivative instruments as of June 30, 2014 and December 31, 2013 (dollars in thousands):
														Gross Amounts Not
														Offset in the Balance Sheet
			Gross Amounts				Gross Amounts				Net Amounts			Financial				Cash Collateral				Net Amount
			Recognized				Offset in the				Presented in the			Instruments				Pledged/
							Balance Sheet				Balance Sheet							Received
	June 30, 2014:
	Derivative assets		$	145,504			$	(9,733	)		$	135,771		$	(19,532	)		$	(103,981	)		$	12,258
	Derivative liabilities		18,137				(9,733		)		8,404			(23,004		)		—				(14,600		)
	December 31, 2013:
	Derivative assets		$	101,352			$	(26,125	)		$	75,227		$	(11,095	)		$	(51,006	)		$	13,126
	Derivative liabilities		42,336				(26,125		)		16,211			(18,081		)		(8,033		)		(9,903		)
	Accounting for Derivative Instruments and Hedging Activities
	The Company does not enter into derivative instruments for speculative purposes. As discussed below under “Non-qualifying Derivatives and Derivatives for Purposes Other Than Hedging,” the Company uses various derivative instruments for risk management purposes that either do not qualify or have not been qualified for hedge accounting treatment, including derivatives used to economically hedge changes in the fair value of liabilities associated with the reinsurance of variable annuities with guaranteed living benefits. As of June 30, 2014 and December 31, 2013, the Company held interest rate swaps that were designated and qualified as cash flow hedges of interest rate risk, held foreign currency swaps that were designated and qualified as hedges of a portion of its net investment in its foreign operations and had derivative instruments that were not designated as hedging instruments. See Note 2 – “Summary of Significant Accounting Policies” of the Company’s 2013 Annual Report for a detailed discussion of the accounting treatment for derivative instruments, including embedded derivatives. Derivative instruments are carried at fair value and generally require an insignificant amount of cash at inception of the contracts.
	Cash Flow Hedges
	The Company designates and accounts for certain interest rate swaps, in which the cash flows are denominated in different currencies, commonly referred to as cross-currency swaps, as cash flow hedges when they meet the requirements of the general accounting principles for Derivatives and Hedging.
	The following table presents the components of AOCI, before income tax, and the condensed consolidated income statement classification where the gain or loss is recognized related to cash flow hedges for the three and six months ended June 30, 2014 and 2013 (dollars in thousands):
			Three months ended June 30,
			2014				2013
	Accumulated other comprehensive income (loss), balance beginning of period		$	(4,020	)		$	1,961
	Gains (losses) deferred in other comprehensive income (loss) on the effective portion of cash flow hedges		4,798				(6,797		)
	Amounts reclassified to investment income		(321		)		(201		)
	Accumulated other comprehensive income (loss), balance end of period		$	457			$	(5,037	)
			Six months ended June 30,
			2014				2013
	Accumulated other comprehensive income (loss), balance beginning of period		$	(4,578	)		$	403
	Gains (losses) deferred in other comprehensive income (loss) on the effective portion of cash flow hedges		5,574				(4,934		)
	Amounts reclassified to investment income		(539		)		(506		)
	Accumulated other comprehensive income (loss), balance end of period		$	457			$	(5,037	)
	As of June 30, 2014, the before-tax deferred net gains on derivative instruments recorded in AOCI that are expected to be reclassified to earnings during the next twelve months are $1.6 million. This expectation is based on the anticipated interest payments on hedged investments in fixed maturity securities that will occur over the next twelve months, at which time the Company will recognize the deferred net gains (losses) as an adjustment to investment income over the term of the investment cash flows. There were no hedged forecasted transactions, other than the receipt or payment of variable interest payments on existing financial instruments, for the three and six months ended June 30, 2014 and 2013.
	The following table presents the effects of derivatives in cash flow hedging relationships on the condensed consolidated statements of income and AOCI for the three and six months ended June 30, 2014 and 2013 (dollars in thousands):
	Derivatives in Cash Flow		Amount of Gains				Amount and Location of Gains (Losses)							Amount and Location of Gains (Losses)
	Hedging Relationships		(Losses) Deferred in				Reclassified from AOCI into Income (Loss)							Recognized in Income (Loss) on Derivatives
			AOCI on Derivatives
			(Effective Portion)				(Effective Portion)							(Ineffective Portion and Amounts Excluded
														from Effectiveness Testing)
						Investment Related				Investment Income			Investment Related				Investment Income
						Gains (Losses)							Gains (Losses)
For the three months ended June 30, 2014:
Interest rate swaps		$	4,798			$	—			$	321		$	7			$	—
For the three months ended June 30, 2013:
Interest rate swaps		$	(6,797	)		$	—			$	201		$	31			$	—
For the six months ended June 30, 2014:
Interest rate swaps		$	5,574			$	—			$	539		$	1			$	—
For the six months ended June 30, 2013:
Interest rate swaps		$	(4,934	)		$	—			$	506		$	14			$	—
Hedges of Net Investments in Foreign Operations
The Company uses foreign currency swaps to hedge a portion of its net investment in certain foreign operations against adverse movements in exchange rates. The following table illustrates the Company’s net investments in foreign operations (“NIFO”) hedges for the three and six months ended June 30, 2014 and 2013 (dollars in thousands):
	Derivative Gains (Losses) Deferred in AOCI
	For the three months ended June 30,								For the six months ended June 30,
Type of NIFO Hedge (1) (2)	2014				2013				2014			2013
Foreign currency swaps	$	(22,335	)		$	23,913			$	744		$	34,835
-1	There were no sales or substantial liquidations of net investments in foreign operations that would have required the reclassification of gains or losses from accumulated other comprehensive income (loss) into investment income during the periods presented.
-2	There was no ineffectiveness recognized for the Company’s hedges of net investments in foreign operations.
The cumulative foreign currency translation gain recorded in AOCI related to these hedges was $24.7 million and $23.9 million at June 30, 2014 and December 31, 2013, respectively. If a foreign operation was sold or substantially liquidated, the amounts in AOCI would be reclassified to the condensed consolidated statements of income. A pro rata portion would be reclassified upon partial sale of a foreign operation.
Non-qualifying Derivatives and Derivatives for Purposes Other Than Hedging
The Company uses various other derivative instruments for risk management purposes that either do not qualify or have not been qualified for hedge accounting treatment, including derivatives used to economically hedge changes in the fair value of liabilities associated with the reinsurance of variable annuities with guaranteed living benefits. The gain or loss related to the change in fair value for these derivative instruments is recognized in investment related gains (losses), in the condensed consolidated statements of income, except where otherwise noted. The Company recognized investment related gains (losses) of $13.8 million and $(52.4) million for the three months, and $33.6 million and $(112.8) million for the six months ended June 30, 2014 and 2013, respectively, related to derivatives (not including embedded derivatives) that do not qualify or have not been qualified for hedge accounting.
A summary of the effect of non-hedging derivatives, including embedded derivatives, on the Company’s income statement for the three and six months ended June 30, 2014 and 2013 is as follows (dollars in thousands):
				Gain (Loss) for the three months ended
				June 30,
Type of Non-hedging Derivative		Income Statement Location of Gain (Loss)		2014				2013
Interest rate swaps		Investment related gains (losses), net		$	22,251			$	(38,415	)
Interest rate options		Investment related gains (losses), net		2,004				(7,981		)
Financial futures		Investment related gains (losses), net		(7,684		)		714
Foreign currency forwards		Investment related gains (losses), net		1,178				(2,958		)
CPI swaps		Investment related gains (losses), net		114				(1,117		)
Credit default swaps		Investment related gains (losses), net		4,783				2,427
Equity options		Investment related gains (losses), net		(8,800		)		(5,049		)
Embedded derivatives in:
Modified coinsurance or funds withheld arrangements		Investment related gains (losses), net		78,835				47,717
Indexed annuity products		Interest credited		(27,285		)		(28,019		)
Variable annuity products		Investment related gains (losses), net		(5,183		)		35,809
Total non-hedging derivatives				$	60,213			$	3,128
				Gain (Loss) for the six months ended
				June 30,
Type of Non-hedging Derivative		Income Statement Location of Gain (Loss)		2014				2013
Interest rate swaps		Investment related gains (losses), net		$	51,904			$	(60,679	)
Interest rate options		Investment related gains (losses), net		3,286				(5,998		)
Financial futures		Investment related gains (losses), net		(9,268		)		(6,167		)
Foreign currency forwards		Investment related gains (losses), net		2,332				(8,617		)
CPI swaps		Investment related gains (losses), net		467				(1,988		)
Credit default swaps		Investment related gains (losses), net		2,669				6,332
Equity options		Investment related gains (losses), net		(17,765		)		(35,672		)
Embedded derivatives in:
Modified coinsurance or funds withheld arrangements		Investment related gains (losses), net		156,076				137,974
Indexed annuity products		Interest credited		(51,125		)		(61,015		)
Variable annuity products		Investment related gains (losses), net		(28,844		)		87,123
Total non-hedging derivatives				$	109,732			$	51,293
Types of Derivatives Used by the Company
Interest Rate Swaps
Interest rate swaps are used by the Company primarily to reduce market risks from changes in interest rates and to alter interest rate exposure arising from mismatches between assets and liabilities (duration mismatches). With an interest rate swap, the Company agrees with another party to exchange, at specified intervals, the difference between two rates, which can be either fixed-rate or floating-rate interest amounts, tied to an agreed-upon notional principal amount. These transactions are executed pursuant to master agreements that provide for a single net payment or individual gross payments at each due date.
Interest Rate Options
Interest rate options, commonly referred to as swaptions, are used by the Company primarily to hedge living benefit guarantees embedded in certain variable annuity products. A swaption, used to hedge against adverse changes in interest rates, is an option to enter into a swap with a forward starting effective date. The Company pays an upfront premium for the right to exercise this option in the future.
Financial Futures
Exchange-traded futures are used primarily to economically hedge liabilities embedded in certain variable annuity products. With exchange-traded futures transactions, the Company agrees to purchase or sell a specified number of contracts, the value of which is determined by the relevant indices, and to post variation margin on a daily basis in an amount equal to the difference between the daily estimated fair values of those contracts. The Company enters into exchange-traded futures with regulated futures commission merchants that are members of the exchange.
Equity Options
Equity index options are used by the Company primarily to hedge minimum guarantees embedded in certain variable annuity products. To hedge against adverse changes in equity indices volatility, the Company buys put options. The contracts are net settled in cash based on differentials in the indices at the time of exercise and the strike price.
Consumer Price Index Swaps
Consumer price index (“CPI”) swaps are used by the Company primarily to economically hedge liabilities embedded in certain insurance products where value is directly affected by changes in a designated benchmark consumer price index. With a CPI swap transaction, the Company agrees with another party to exchange the actual amount of inflation realized over a specified period of time for a fixed amount of inflation determined at inception. These transactions are executed pursuant to master agreements that provide for a single net payment or individual gross payments to be made by the counterparty at each due date. Most of these swaps will require a single payment to be made by one counterparty at the maturity date of the swap.
Foreign Currency Swaps
Foreign currency swaps are used by the Company to reduce the risk from fluctuations in foreign currency exchange rates associated with its assets and liabilities denominated in foreign currencies. With a foreign currency swap transaction, the Company agrees with another party to exchange, at specified intervals, the difference between one currency and another at a forward exchange rate calculated by reference to an agreed upon principal amount. The principal amount of each currency is exchanged at the termination of the currency swap by each party. The Company uses foreign currency swaps to hedge a portion of its net investment in certain foreign operations against adverse movements in exchange rates.
Foreign Currency Forwards
Foreign currency forwards are used by the Company to reduce the risk from fluctuations in foreign currency exchange rates associated with its assets and liabilities denominated in foreign currencies. With a foreign currency forward transaction, the Company agrees with another party to deliver a specified amount of an identified currency at a specified future date. The price is agreed upon at the time of the contract and payment for such a contract is made in a different currency at the specified future date.
Credit Default Swaps
The Company sells protection under single name credit default swaps and credit default swap index tranches to diversify its credit risk exposure in certain portfolios and, in combination with purchasing securities, to replicate characteristics of similar investments based on the credit quality and term of the credit default swap. Credit default triggers for indexed reference entities and single name reference entities are defined in the contracts. The Company’s maximum exposure to credit loss equals the notional value for credit default swaps. In the event of default of a referencing entity, the Company is typically required to pay the protection holder the full notional value less a recovery amount determined at auction.
The following table presents the estimated fair value, maximum amount of future payments and weighted average years to maturity of credit default swaps sold by the Company at June 30, 2014 and December 31, 2013 (dollars in thousands):
		30-Jun-14										31-Dec-13
Rating Agency Designation of Referenced Credit Obligations(1)		Estimated Fair				Maximum				Weighted		Estimated Fair				Maximum				Weighted
		Value of Credit				Amount of Future				Average		Value of Credit				Amount of Future				Average
		Default Swaps				Payments under				Years to		Default Swaps				Payments under				Years to
						Credit Default				Maturity(3)						Credit Default				Maturity(3)
						Swaps(2)										Swaps(2)
AAA/AA-/A+/A/A-
Single name credit default swaps		$	1,995			$	132,500			4.9		$	614			$	117,500			5.1
Credit default swaps referencing indices		—				—				—		—				—				—
Subtotal		1,995				132,500				4.9		614				117,500				5.1
BBB+/BBB/BBB-
Single name credit default swaps		1,218				195,200				5.4		656				142,200				4.9
Credit default swaps referencing indices		7,717				391,000				5		7,295				405,000				5
Subtotal		8,935				586,200				5.1		7,951				547,200				5
BB+
Single name credit default swaps		(163		)		5,000				5		—				—				—
Credit default swaps referencing indices		—				—				—		—				—				—
Subtotal		(163		)		5,000				5		—				—				—
Total		$	10,767			$	723,700			5.1		$	8,565			$	664,700			4.4
-1	The rating agency designations are based on ratings from Standard and Poor’s (“S&P”).
-2	Assumes the value of the referenced credit obligations is zero.
-3	The weighted average years to maturity of the credit default swaps is calculated based on weighted average notional amounts.
The Company also purchases credit default swaps to reduce its risk against a drop in bond prices due to credit concerns of certain bond issuers. If a credit event, as defined by the contract, occurs, the Company is able to put the bond back to the counterparty at par.
Synthetic Guaranteed Investment Contracts
The Company sells fee-based synthetic guaranteed investment contracts which include investment-only, stable value contracts, to retirement plans. The assets are owned by the trustees of such plans, who invest the assets under the terms of investment guidelines agreed to with the Company. The contracts contain a guarantee of a minimum rate of return on participant balances supported by the underlying assets, and a guarantee of liquidity to meet certain participant-initiated plan cash flow requirements. These contracts are reported as derivatives, recorded at fair value and classified as interest rate derivatives.
Embedded Derivatives
The Company has certain embedded derivatives which are required to be separated from their host contracts and reported as derivatives. Host contracts include reinsurance treaties structured on a modified coinsurance (“modco”) or funds withheld basis. Changes in fair values of embedded derivatives on modco or funds withheld treaties are net of a decrease in investment related gains (losses), net of $0.5 million and $0.4 million for the three months, and $1.3 million and $2.1 million for the six months ended June 30, 2014 and 2013, respectively, associated with the Company’s own credit risk. Changes in fair values of embedded derivatives on variable annuity contracts are net of an increase (decrease) in investment related gains (losses), net of $0.1 million and $(0.2) million for the three months, and $0.5 million and $(4.9) million for the six months ended June 30, 2014 and 2013, respectively, associated with the Company’s own credit risk. Additionally, the Company reinsures equity-indexed annuity and variable annuity contracts with benefits that are considered embedded derivatives, including guaranteed minimum withdrawal benefits, guaranteed minimum accumulation benefits, and guaranteed minimum income benefits. The related gains (losses) and the effect on net income after amortization of deferred acquisition costs (“DAC”) and income taxes for the three and six months ended June 30, 2014 and 2013 are reflected in the following table (dollars in thousands):
	Three months ended June 30,								Six months ended June 30,
	2014				2013				2014			2013
Embedded derivatives in modco or funds withheld arrangements included in investment related gains	$	78,835			$	47,717			$	156,076		$	137,974
After the associated amortization of DAC and taxes, the related amounts included in net income	17,962				13,911				36,042			35,535
Embedded derivatives in variable annuity contracts included in investment related gains	(5,183		)		35,809				(28,844		)	87,123
After the associated amortization of DAC and taxes, the related amounts included in net income	(6,486		)		29,082				(20,154		)	41,274
Amounts related to embedded derivatives in equity-indexed annuities included in benefits and expenses	(27,285		)		(28,019		)		(51,125		)	(61,015		)
After the associated amortization of DAC and taxes, the related amounts included in net income	(15,600		)		(30,845		)		(33,976		)	(60,395		)
Credit Risk
The Company manages its credit risk related to over-the-counter ("OTC") derivatives by entering into transactions with creditworthy counterparties, maintaining collateral arrangements and through the use of master netting agreements that provide for a single net payment to be made by one counterparty to another at each due date and upon termination.
The credit exposure of the Company's OTC derivative transactions is represented by the contracts with a positive fair value (market value) at the reporting date. To reduce credit exposures, the Company seeks to (i) enter into OTC derivative transactions pursuant to master netting agreements that provide for a netting of payments and receipts with a single counterparty, and (ii) enter into agreements that allow the use of credit support annexes, which are bilateral rating-sensitive agreements that require collateral postings at established threshold levels. Certain of the Company's OTC derivatives are cleared derivatives, which are bilateral transactions between the Company and a counterparty where the transactions are cleared through a clearinghouse, such that each derivative counterparty is only exposed to the default of the clearinghouse. These cleared transactions require initial and daily variation margin collateral postings and include certain interest rate swaps and credit default swaps entered into on or after June 10, 2013, related to new guidelines implemented under the Dodd-Frank Wall Street Reform and Consumer Protection Act. Also, the Company enters into exchange-traded futures through regulated exchanges and these transactions are settled on a daily basis, thereby reducing credit risk exposure in the event of non-performance by counterparties to such financial instruments.
The Company enters into various collateral arrangements, which require both the posting and accepting of collateral in connection with its derivative instruments. Collateral agreements contain attachment thresholds that may vary depending on the posting party’s ratings. Additionally, a decline in the Company’s or the counterparty’s credit ratings to specified levels could result in potential settlement of the derivative positions under the Company’s agreements with its counterparties. The Company also has exchange-traded futures, which require the maintenance of a margin account. As exchange-traded futures are affected through regulated exchanges, and positions are marked to market on a daily basis, the Company has minimal exposure to credit-related losses in the event of nonperformance by counterparties.
The Company’s credit exposure related to derivative contracts is generally limited to the fair value at the reporting date plus or minus any collateral posted or held by the Company. Information regarding the Company’s credit exposure related to its over-the-counter derivative contracts, centrally cleared derivative contracts and margin account for exchange-traded futures at June 30, 2014 and December 31, 2013 are reflected in the following table (dollars in thousands):
		30-Jun-14				31-Dec-13
Estimated fair value of derivatives in net asset position		$	127,367			$	59,016
Cash provided as collateral(1)		—				8,033
Securities pledged to counterparties as collateral(2)		23,004				18,081
Cash pledged from counterparties as collateral(3)		(103,981		)		(51,006		)
Securities pledged from counterparties as collateral(4)		(19,532		)		(11,095		)
Initial margin for cleared derivatives		(13,854		)		(13,350		)
Net credit exposure		$	13,004			$	9,679
Margin account related to exchange-traded futures(5)		$	6,524			$	2,566
-1	Consists of receivable from counterparty, included in other assets.
-2	Included in other invested assets, primarily consists of U.S. Treasury securities.
-3	Included in cash and cash equivalents, with obligation to return cash collateral recorded in other liabilities.
-4	Consists of U.S. Treasury securities.
-5	Included in cash and cash equivalents.

Fair_Value_of_Assets_and_Liabi

Fair Value of Assets and Liabilities	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Disclosures	'
	Fair Value of Assets and Liabilities
	Fair Value Measurement
	General accounting principles for Fair Value Measurements and Disclosures define fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. These principles also establish a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value and describes three levels of inputs that may be used to measure fair value:
	Level 1 - Unadjusted quoted prices in active markets for identical assets or liabilities. Active markets are defined as having the following characteristics for the measured asset/liability: (i) many transactions, (ii) current prices, (iii) price quotes not varying substantially among market makers, (iv) narrow bid/ask spreads and (v) most information publicly available. The Company’s Level 1 assets include investment securities that are traded in exchange markets.
	Level 2 - Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or market standard valuation techniques and assumptions with significant inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Such observable inputs include benchmarking prices for similar assets in active, liquid markets, quoted prices in markets that are not active and observable yields and spreads in the market. The Company’s Level 2 assets and liabilities include investment securities with quoted prices that are traded less frequently than exchange-traded instruments and derivative contracts whose values are determined using market standard valuation techniques. This category primarily includes corporate securities, Canadian and Canadian provincial government securities, and residential and commercial mortgage-backed securities, among others. Level 2 valuations are generally obtained from third party pricing services for identical or comparable assets or liabilities or through the use of valuation methodologies using observable market inputs. Prices from servicers are validated through analytical reviews and assessment of current market activity.
	Level 3 - Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the related assets or liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using market standard valuation techniques described above. When observable inputs are not available, the market standard techniques for determining the estimated fair value of certain securities that trade infrequently, and therefore have little transparency, rely on inputs that are significant to the estimated fair value and that are not observable in the market or cannot be derived principally from or corroborated by observable market data. These unobservable inputs can be based in large part on management judgment or estimation and cannot be supported by reference to market activity. Even though unobservable, management believes these inputs are based on assumptions deemed appropriate given the circumstances and consistent with what other market participants would use when pricing similar assets and liabilities. For the Company’s invested assets, this category generally includes corporate securities (primarily private placements and bank loans), asset-backed securities (including collateralized debt obligations and those with exposure to subprime mortgages), and to a lesser extent, certain residential and commercial mortgage-backed securities, among others. Prices are determined using valuation methodologies such as discounted cash flow models and other similar techniques. Non-binding broker quotes, which are utilized when pricing service information is not available, are reviewed for reasonableness based on the Company’s understanding of the market, and are generally considered Level 3. Under certain circumstances, based on its observations of transactions in active markets, the Company may conclude the prices received from independent third party pricing services or brokers are not reasonable or reflective of market activity. In those instances, the Company would apply internally developed valuation techniques to the related assets or liabilities. Additionally, the Company’s embedded derivatives, all of which are associated with reinsurance treaties, are classified in Level 3 since their values include significant unobservable inputs.
	When inputs used to measure fair value fall within different levels of the hierarchy, the level within which the fair value measurement is categorized is based on the lowest level input that is significant to the fair value measurement in its entirety. For example, a Level 3 fair value measurement may include inputs that are observable (Levels 1 and 2) and unobservable (Level 3). Therefore, gains and losses for such assets and liabilities categorized within Level 3 may include changes in fair value that are attributable to both observable inputs (Levels 1 and 2) and unobservable inputs (Level 3).
	Assets and Liabilities by Hierarchy Level
	Assets and liabilities measured at fair value on a recurring basis as of June 30, 2014 and December 31, 2013 are summarized below (dollars in thousands):
	June 30, 2014:						Fair Value Measurements Using:
			Total				Level 1				Level 2			Level 3
	Assets:
	Fixed maturity securities – available-for-sale:
	Corporate securities		$	14,151,411			$	107,831			$	12,755,640		$	1,287,940
	Canadian and Canadian provincial governments		3,747,638				—				3,747,638			—
	Residential mortgage-backed securities		986,139				—				800,592			185,547
	Asset-backed securities		1,008,375				—				452,215			556,160
	Commercial mortgage-backed securities		1,474,620				—				1,376,706			97,914
	U.S. government and agencies securities		448,506				350,852				64,660			32,994
	State and political subdivision securities		407,487				—				361,720			45,767
	Other foreign government supranational and foreign government-sponsored enterprises		2,256,220				306,505				1,938,827			10,888
	Total fixed maturity securities – available-for-sale		24,480,396				765,188				21,497,998			2,217,210
	Funds withheld at interest – embedded derivatives		(20,194		)		—				—			(20,194		)
	Cash equivalents		516,798				516,798				—			—
	Short-term investments		21,702				10,085				11,617			—
	Other invested assets:
	Non-redeemable preferred stock		86,838				86,838				—			—
	Other equity securities		53,906				53,906				—			—
	Derivatives:
	Interest rate swaps		56,229				—				56,229			—
	Interest rate options		5,840				—				5,840			—
	CPI swaps		69				—				69			—
	Credit default swaps		10,626				—				10,626			—
	Equity options		39,948				—				39,948			—
	Foreign currency swaps		23,059				—				23,059			—
	FVO contractholder-directed unit-linked investments		151,726				145,252				6,474			—
	Other		17,407				17,407				—			—
	Total other invested assets		445,648				303,403				142,245			—
	Total		$	25,444,350			$	1,595,474			$	21,651,860		$	2,197,016
	Liabilities:
	Interest sensitive contract liabilities – embedded derivatives		$	940,236			$	—			$	—		$	940,236
	Other liabilities:
	Derivatives:
	Interest rate swaps		865				—				865			—
	Foreign currency forwards		7,679				—				7,679			—
	Credit default swaps		(140		)		—				(140		)	—
	Total		$	948,640			$	—			$	8,404		$	940,236
	December 31, 2013:						Fair Value Measurements Using:
			Total				Level 1				Level 2			Level 3
	Assets:
	Fixed maturity securities – available-for-sale:
	Corporate securities		$	12,110,755			$	68,934			$	10,696,532		$	1,345,289
	Canadian and Canadian provincial governments		3,381,025				—				3,381,025			—
	Residential mortgage-backed securities		989,643				—				836,138			153,505
	Asset-backed securities		894,832				—				422,984			471,848
	Commercial mortgage-backed securities		1,388,946				—				1,287,161			101,785
	U.S. government and agencies securities		501,351				396,092				64,340			40,919
	State and political subdivision securities		320,820				—				277,044			43,776
	Other foreign government, supranational and foreign government-sponsored enterprises		1,886,764				304,487				1,544,280			37,997
	Total fixed maturity securities – available-for-sale		21,474,136				769,513				18,509,504			2,195,119
	Funds withheld at interest – embedded derivatives		(176,270		)		—				—			(176,270		)
	Cash equivalents		371,345				371,345				—			—
	Short-term investments		111,572				105,649				5,923			—
Other invested assets:
Non-redeemable preferred stock		81,854				74,220				2,672			4,962
Other equity securities		323,877				323,877				—			—
Derivatives:
Interest rate swaps		9,904				—				9,904			—
Interest rate options		2,554				—				2,554			—
CPI swaps		(309		)		—				(309		)	—
Credit default swaps		7,926				—				7,926			—
Equity options		33,869				—				33,869			—
Foreign currency swaps		21,283				—				21,283			—
FVO contractholder-directed unit-linked investments		138,892				132,643				6,249			—
Other		9,142				9,142				—			—
Total other invested assets		628,992				539,882				84,148			4,962
Total		$	22,409,775			$	1,786,389			$	18,599,575		$	2,023,811
Liabilities:
Interest sensitive contract liabilities – embedded derivatives		$	868,725			$	—			$	—		$	868,725
Other liabilities:
Derivatives:
Interest rate swaps		3,828				—				3,828			—
Foreign currency forwards		12,772				—				12,772			—
Credit default swaps		(356		)		—				(356		)	—
Equity options		(33		)		—				(33		)	—
Total		$	884,936			$	—			$	16,211		$	868,725
The Company may utilize information from third parties, such as pricing services and brokers, to assist in determining the fair value for certain assets and liabilities; however, management is ultimately responsible for all fair values presented in the Company’s condensed consolidated financial statements. This includes responsibility for monitoring the fair value process, ensuring objective and reliable valuation practices and pricing of financial instruments, and approving changes to valuation methodologies and pricing sources. The selection of the valuation technique(s) to apply considers the definition of an exit price and the nature of the asset or liability being valued and significant expertise and judgment is required.
The Company performs initial and ongoing analysis and review of the various techniques utilized in determining fair value to ensure that the valuation approaches utilized are appropriate and consistently applied, and that the various assumptions are reasonable. The Company also performs ongoing analysis and review of the information and prices received from third parties to ensure that the prices represent a reasonable estimate of the fair value and to monitor controls around pricing, which includes quantitative and qualitative analysis and is overseen by the Company’s investment and accounting personnel. Examples of procedures performed include, but are not limited to, review of pricing trends, comparison of a sample of executed prices of securities sold to the fair value estimates, comparison of fair value estimates to management’s knowledge of the current market, and ongoing confirmation that third party pricing services use, wherever possible, market-based parameters for valuation. In addition, the Company utilizes both internal and external cash flow models to analyze the reasonableness of fair values utilizing credit spread and other market assumptions, where appropriate. As a result of the analysis, if the Company determines there is a more appropriate fair value based upon the available market data, the price received from the third party is adjusted accordingly. The Company also determines if the inputs used in estimated fair values received from pricing services are observable by assessing whether these inputs can be corroborated by observable market data.
The fair value of embedded derivative liabilities, including those calculated by third parties, are monitored through the use of attribution reports to quantify the effect of underlying sources of fair value change, including capital market inputs based on policyholder account values, interest rates and short-term and long-term implied volatilities, from period to period. Actuarial assumptions are based on experience studies performed internally in combination with available industry information and are reviewed on a periodic basis, at least annually.
For assets and liabilities reported at fair value, the Company utilizes, when available, fair values based on quoted prices in active markets that are regularly and readily obtainable. Generally, these are very liquid investments and the valuation does not require management judgment. When quoted prices in active markets are not available, fair value is based on market valuation techniques, market comparable pricing and the income approach. The use of different techniques, assumptions and inputs may have a material effect on the estimated fair values of the Company’s securities holdings. For the periods presented, the application of market standard valuation techniques applied to similar assets and liabilities has been consistent.
The methods and assumptions the Company uses to estimate the fair value of assets and liabilities measured at fair value on a recurring basis are summarized below.
Fixed Maturity Securities – The fair values of the Company’s publicly-traded fixed maturity securities are generally based on prices obtained from independent pricing services. Prices from pricing services are sourced from multiple vendors, and a vendor hierarchy is maintained by asset type based on historical pricing experience and vendor expertise. The Company generally receives prices from multiple pricing services for each security, but ultimately uses the price from the pricing service highest in the vendor hierarchy based on the respective asset type. To validate reasonableness, prices are periodically reviewed as explained above. Consistent with the fair value hierarchy described above, securities with validated quotes from pricing services are generally reflected within Level 2, as they are primarily based on observable pricing for similar assets and/or other market observable inputs. If the pricing information received from third party pricing services is not reflective of market activity or other inputs observable in the market, the Company may challenge the price through a formal process with the pricing service.
If the Company ultimately concludes that pricing information received from the independent pricing service is not reflective of market activity, non-binding broker quotes are used, if available. If the Company concludes the values from both pricing services and brokers are not reflective of market activity, it may override the information from the pricing service or broker with an internally developed valuation; however, this occurs infrequently. Internally developed valuations or non-binding broker quotes are also used to determine fair value in circumstances where vendor pricing is not available. These estimates may use significant unobservable inputs, which reflect the Company’s assumptions about the inputs that market participants would use in pricing the asset. Circumstances where observable market data are not available may include events such as market illiquidity and credit events related to the security. Pricing service overrides, internally developed valuations and non-binding broker quotes are generally based on significant unobservable inputs and are reflected as Level 3 in the valuation hierarchy.
The inputs used in the valuation of corporate and government securities include, but are not limited to standard market observable inputs which are derived from, or corroborated by, market observable data including market yield curve, duration, call provisions, observable prices and spreads for similar publicly traded or privately traded issues that incorporate the credit quality and industry sector of the issuer. For structured securities, valuation is based primarily on matrix pricing or other similar techniques using standard market inputs including spreads for actively traded securities, spreads off benchmark yields, expected prepayment speeds and volumes, current and forecasted loss severity, rating, weighted average coupon, weighted average maturity, average delinquency rates, geographic region, debt-service coverage ratios and issuance-specific information including, but not limited to: collateral type, payment terms of the underlying assets, payment priority within the tranche, structure of the security, deal performance and vintage of loans.
When observable inputs are not available, the market standard valuation techniques for determining the estimated fair value of certain types of securities that trade infrequently, and therefore have little or no price transparency, rely on inputs that are significant to the estimated fair value that are not observable in the market or cannot be derived principally from or corroborated by observable market data. These unobservable inputs can be based in large part on management judgment or estimation, and cannot be supported by reference to market activity. Even though unobservable, these inputs are based on assumptions deemed appropriate given the circumstances and are believed to be consistent with what other market participants would use when pricing such securities.
The fair values of private placement securities are primarily determined using a discounted cash flow model. In certain cases these models primarily use observable inputs with a discount rate based upon the average of spread surveys collected from private market intermediaries who are active in both primary and secondary transactions, taking into account, among other factors, the credit quality and industry sector of the issuer and the reduced liquidity associated with private placements. Generally, these securities have been reflected within Level 3. For certain private fixed maturities, the discounted cash flow model may also incorporate significant unobservable inputs, which reflect the Company’s own assumptions about the inputs market participants would use in pricing the security. To the extent management determines that such unobservable inputs are not significant to the price of a security, a Level 2 classification is made. Otherwise, a Level 3 classification is used.
Embedded Derivatives – For embedded derivative liabilities associated with the underlying products in reinsurance treaties, primarily equity-indexed and variable annuity treaties, the Company utilizes a discounted cash flow model, which includes an estimate of future equity option purchases and an adjustment for the Company’s own credit risk. The variable annuity embedded derivative calculations are performed by third parties based on methodology and input assumptions provided by the Company. To validate the reasonableness of the resulting fair value, the Company’s internal actuaries perform reviews and analytical procedures on the results. The capital market inputs to the model, such as equity indexes, short-term equity volatility and interest rates, are generally observable. The valuation also requires certain significant inputs, which are generally not observable and accordingly, the valuation is considered Level 3 in the fair value hierarchy, see “Level 3 Measurements and Transfers” below for a description.
The fair value of embedded derivatives associated with funds withheld reinsurance treaties is determined based upon a total return swap technique with reference to the fair value of the investments held by the ceding company that support the Company’s funds withheld at interest asset with an adjustment for the Company’s own credit risk. The fair value of the underlying assets is generally based on market observable inputs using industry standard valuation techniques. The valuation also requires certain significant inputs, which are generally not observable and accordingly, the valuation is considered Level 3 in the fair value hierarchy, see “Level 3 Measurements and Transfers” below for a description.
Company’s Own Credit Risk – The Company uses a structural default risk model to estimate its own credit risk. The input assumptions are a combination of externally derived and published values (default threshold and uncertainty), market inputs (interest rate, Company equity price per share, Company debt per share, Company equity price volatility) and insurance industry data (Loss Given Default), adjusted for market recoverability.
Cash Equivalents and Short-Term Investments – Cash equivalents and short-term investments include money market instruments, commercial paper and other highly liquid debt instruments. Money market instruments are generally valued using unadjusted quoted prices in active markets that are accessible for identical assets and are primarily classified as Level 1. The fair value of certain other short-term investments, such as floating rate notes and bonds with original maturities less than twelve months, are based upon other market observable data and are typically classified as Level 2. However, certain short-term investments may incorporate significant unobservable inputs resulting in a Level 3 classification. Various time deposits carried as cash equivalents or short-term investments are not measured at estimated fair value and therefore are excluded from the tables presented.
Equity Securities – Equity securities consist principally of exchange-traded funds and preferred stock of publicly and privately traded companies. The fair values of publicly traded equity securities are primarily based on quoted market prices in active markets and are classified within Level 1 in the fair value hierarchy. The fair values of preferred equity securities, for which quoted market prices are not readily available, are based on prices obtained from independent pricing services and these securities are generally classified within Level 2 in the fair value hierarchy. Non-binding broker quotes for equity securities are generally based on significant unobservable inputs and are reflected as Level 3 in the fair value hierarchy.
FVO Contractholder-Directed Unit-Linked Investments - FVO contractholder-directed investments supporting unit-linked variable annuity type liabilities primarily consist of exchange-traded funds and, to a lesser extent, fixed maturity securities and cash and cash equivalents. The fair values of the exchange-traded securities are primarily based on quoted market prices in active markets and are classified within Level 1 of the hierarchy. The fair value of the fixed maturity contractholder-directed securities is determined on a basis consistent with the methodologies described above for fixed maturity securities and are classified within Level 2 of the hierarchy.
Derivative Assets and Derivative Liabilities – All of the derivative instruments utilized by the Company are classified within Level 2 on the fair value hierarchy. These derivatives are principally valued using an income approach. Valuations of interest rate contracts are based on present value techniques, which utilize significant inputs that may include the swap yield curve, LIBOR basis curves, and repurchase rates. Valuations of foreign currency contracts, are based on present value techniques, which utilize significant inputs that may include the swap yield curve, LIBOR basis curves, currency spot rates, and cross currency basis curves. Valuations of credit contracts are based on present value techniques, which utilize significant inputs that may include the swap yield curve, credit curves, and recovery rates. Valuations of equity market contracts, non-option-based, are based on present value techniques, which utilize significant inputs that may include the swap yield curve, spot equity index levels, and dividend yield curves. Valuations of equity market contracts, option-based, are based on option pricing models, which utilize significant inputs that may include the swap yield curve, spot equity index levels, dividend yield curves, and equity volatility. The Company does not currently have derivatives included in Level 3 measurement.
Level 3 Measurements and Transfers
As of June 30, 2014 and December 31, 2013, respectively, the Company classified approximately 9.1% and 10.2% of its fixed maturity securities in the Level 3 category. These securities primarily consist of private placement corporate securities and bank loans with inactive trading markets. Additionally, the Company has included asset-backed securities with subprime exposure and mortgage-backed securities with below investment grade ratings in the Level 3 category due to market uncertainty associated with these securities and the Company’s utilization of unobservable information from third parties for the valuation of these securities.
The significant unobservable inputs used in the fair value measurement of the Company’s corporate, sovereign, government-backed, and other political subdivision investments are probability of default, liquidity premium and subordination premium. Significant increases (decreases) in any of those inputs in isolation would result in a significantly lower (higher) fair value measurement. Generally, a change in the assumption used for the probability of default is accompanied by a directionally similar change in the assumptions used for the liquidity premium and subordination premium. For securities with a fair value derived using the market comparable pricing valuation technique, liquidity premium is the only significant unobservable input.
The significant unobservable inputs used in the fair value measurement of the Company’s asset and mortgage-backed securities are prepayment rates, probability of default, liquidity premium and loss severity in the event of default. Significant increases (decreases) in any of those inputs in isolation would result in a significantly lower (higher) fair value measurement. Generally, a change in the assumption used for the probability of default is accompanied by a directionally similar change in the assumption used for the liquidity premium and loss severity and a directionally opposite change in the assumption used for prepayment rates.
The actuarial assumptions used in the fair value of embedded derivatives which include assumptions related to lapses, withdrawals, and mortality, are based on experience studies performed by the Company in combination with available industry information and are reviewed on a periodic basis, at least annually. The significant unobservable inputs used in the fair value measurement of embedded derivatives are assumptions associated with policyholder experience and selected capital market assumptions for equity-indexed and variable annuities. The selected capital market assumptions, which include long-term implied volatilities, are projections based on short-term historical information. Changes in interest rates, equity indices, equity volatility, the Company’s own credit risk, and actuarial assumptions regarding policyholder experience may result in significant fluctuations in the value of embedded derivatives.
Fair value measurements associated with funds withheld reinsurance treaties are generally not materially sensitive to changes in unobservable inputs associated with policyholder experience. The primary drivers of change in these fair values are related to movements of credit spreads, which are generally observable. Increases (decreases) in market credit spreads tend to decrease (increase) the fair value of embedded derivatives. Increases (decreases) in the own credit assumption tend to decrease (increase) the magnitude of the fair value of embedded derivatives.
Fair value measurements associated with variable annuity treaties are sensitive to both capital markets inputs and policyholder experience inputs. Increases (decreases) in lapse rates tend to decrease (increase) the value of the embedded derivatives associated with variable annuity treaties. Increases (decreases) in the long-term volatility assumption tend to increase (decrease) the fair value of embedded derivatives. Increases (decreases) in the own credit assumption tend to decrease (increase) the magnitude of the fair value of embedded derivatives.
The following table presents quantitative information about significant unobservable inputs used in Level 3 fair value measurements that are developed by the Company, which does not include unobservable Level 3 asset and liability measurements provided by third parties, as of June 30, 2014 and December 31, 2013 (dollars in thousands):
June 30, 2014:						Valuation Technique(s)		Unobservable Input		Range (Weighted Average)
		Fair Value
Assets:
State and political subdivision securities		$	16,951			Market comparable securities		Liquidity premium		1	%
Corporate securities		256,581				Market comparable securities		Liquidity premium		0-2% (1%)
U.S. government and agencies		32,994				Market comparable securities		Liquidity premium		0-1% (1%)
Funds withheld at interest- embedded derivatives		(20,194		)		Total return swap		Mortality		0-100%  (2%)
								Lapse		0-35%  (7%)
								Withdrawal		0-5%  (3%)
								Own Credit		0-1%  (1%)
								Crediting rate		2-4%  (3%)
Liabilities:
Interest sensitive contract liabilities- embedded derivatives- indexed annuities		881,337				Discounted cash flow		Mortality		0-100%  (2%)
								Lapse		0-35%  (7%)
								Withdrawal		0-5%  (3%)
								Option budget projection		2-4%  (3%)
Interest sensitive contract liabilities- embedded derivatives- variable annuities		58,899				Discounted cash flow		Mortality		0-100% (2%)
								Lapse		0-25% (8%)
								Withdrawal		0-7% (3%)
								Own Credit		0-1% (1%)
								Long-term volatility		0-27% (15%)
	December 31, 2013:		Fair Value				Valuation Technique(s)		Unobservable Input		Range (Weighted Average)
	Assets:
	State and political subdivision securities		$	29,024			Market comparable securities		Liquidity premium		1	%
	Corporate securities		312,887				Market comparable securities		Liquidity premium		0-2%  (1%)
	U.S. government and agencies		37,539				Market comparable securities		Liquidity premium		0-1%  (1%)
	Funds withheld at interest- embedded derivatives		(176,270		)		Total return swap		Mortality		0-100%  (2%)
									Lapse		0-35%  (7%)
									Withdrawal		0-5%  (3%)
									Own Credit		0-1%  (1%)
									Crediting Rate		2-4%  (3%)
	Liabilities:
	Interest sensitive contract liabilities- embedded derivatives- indexed annuities		838,670				Discounted cash flow		Mortality		0-100% (2%)
									Lapse		0-35% (7%)
									Withdrawal		0-5% (3%)
									Option budget projection		2-4% (3%)
	Interest sensitive contract liabilities- embedded derivatives- variable annuities		30,055				Discounted cash flow		Mortality		0-100% (2%)
									Lapse		0-25% (6%)
									Withdrawal		0-7% (3%)
									Own Credit		0-1% (1%)
									Long-term volatility		0-27% (10%)
The Company recognizes transfers of financial instruments into and out of levels within the fair value hierarchy at the beginning of the quarter in which the actual event or change in circumstances that caused the transfer occurs. Financial instruments transferred into Level 3 are due to a lack of observable market transactions and price information. Financial instruments are transferred out of Level 3 when circumstances change such that significant inputs can be corroborated with market observable data. This may be due to a significant increase in market activity for the financial instrument, a specific event, one or more significant input(s) becoming observable. Transfers out of Level 3 were primarily the result of the Company using observable pricing information or a third party pricing quotation that appropriately reflects the fair value of those financial instruments, without the need for adjustment based on the Company’s own assumptions regarding the characteristics of a specific financial instrument or the current liquidity in the market. In addition, certain transfers out of Level 3 were also due to increased observations of market transactions and price information for those financial instruments.
Transfers from Level 1 to Level 2 are due to the lack of observable market data when pricing these securities, while transfers from Level 2 to Level 1 are due to an increase in the availability of market observable data in an active market. The following tables present the transfers between Level 1 and Level 2 during the three and six months ended June 30, 2014 and 2013 (dollars in thousands):
		Three months ended June 30,
		2014								2013
		Transfers from				Transfers from				Transfers from			Transfers from
		Level 1 to				Level 2 to				Level 1 to			Level 2 to
		Level 2				Level 1				Level 2			Level 1
Fixed maturity securities - available-for-sale:
Corporate securities		$	—			$	10,058			$	—		$	—
Total fixed maturity securities		$	—			$	10,058			$	—		$	—
		Six months ended June 30,
		2014								2013
		Transfers from				Transfers from				Transfers from			Transfers from
		Level 1 to				Level 2 to				Level 1 to			Level 2 to
		Level 2				Level 1				Level 2			Level 1
Fixed maturity securities - available-for-sale:
Corporate securities		$	—			$	10,058			$	—		$	14,012
Total fixed maturity securities		$	—			$	10,058			$	—		$	14,012
The tables below provide a summary of the changes in fair value of Level 3 assets and liabilities for the three and six months ended June 30, 2014, as well as the portion of gains or losses included in income for the three and six months ended June 30, 2014 attributable to unrealized gains or losses related to those assets and liabilities still held at June 30, 2014 (dollars in thousands):
For the three months ended June 30, 2014:		Fixed maturity securities - available-for-sale
		Corporate				Residential				Asset-backed			Commercial			U.S. Government
		securities				mortgage-				securities			mortgage-			and agencies
						backed							backed			securities
						securities							securities
Fair value, beginning of period		$	1,291,701			$	177,927			$	502,675		$	90,373		$	38,031
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses		(1,273		)		42				2,055			447			(185		)
Investment related gains (losses), net		165				31				942			6			(55		)
Claims & other policy benefits		—				—				—			—			—
Interest credited		—				—				—			—			—
Policy acquisition costs and other insurance expenses		—				—				—			—			—
Included in other comprehensive income		6,086				368				514			1,639			572
Purchases(1)		52,549				13,398				64,884			—			165
Sales(1)		(8,929		)		—				(14,258		)	—			—
Settlements(1)		(49,002		)		(6,401		)		(6,318		)	(263		)	(5,534		)
Transfers into Level 3		—				901				5,666			5,712			—
Transfers out of Level 3		(3,357		)		(719		)		—			—			—
Fair value, end of period		$	1,287,940			$	185,547			$	556,160		$	97,914		$	32,994
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses		$	(1,274	)		$	42			$	2,005		$	447		$	(185	)
Investment related gains (losses), net		—				—				—			—			—
Claims & other policy benefits		—				—				—			—			—
Interest credited		—				—				—			—			—
Policy acquisition costs and other insurance expenses		—				—				—			—			—
For the three months ended June 30, 2014 (continued):		Fixed maturity securities
		available-for-sale
		State				Other foreign government, supranational and foreign government-sponsored enterprises				Funds withheld			Interest sensitive contract liabilities embedded derivatives
		and political								at interest-
		subdivision								embedded
		securities								derivative
Fair value, beginning of period		$	43,833			$	11,157			$	(99,029	)	$	(911,987	)
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses		10				—				—			—
Investment related gains (losses), net		(4		)		—				78,835			(5,182		)
Claims & other policy benefits		—				—				—			—
Interest credited		—				—				—			(27,285		)
Policy acquisition costs and other insurance expenses		—				—				—			—
Included in other comprehensive income		2,330				33				—			—
Purchases(1)		—				—				—			(14,215		)
Sales(1)		—				—				—			—
Settlements(1)		(402		)		(302		)		—			18,433
Transfers into Level 3		—				—				—			—
Transfers out of Level 3		—				—				—			—
Fair value, end of period		$	45,767			$	10,888			$	(20,194	)	$	(940,236	)
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses		$	10			$	—			$	—		$	—
Investment related gains (losses), net		—				—				78,835			(5,946		)
Claims & other policy benefits		—				—				—			—
Interest credited		—				—				—			(45,718		)
Policy acquisition costs and other insurance expenses		—				—				—			—
For the six months ended June 30, 2014:		Fixed maturity securities - available-for-sale
		Corporate				Residential				Asset-backed			Commercial			U.S. Government
		securities				mortgage-				securities			mortgage-			and agencies
						backed							backed			securities
						securities							securities
Fair value, beginning of period		$	1,345,289			$	153,505			$	471,848		$	101,785		$	40,919
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses		(2,385		)		98				4,112			819			(282		)
Investment related gains (losses), net		5				137				1,247			92			(250		)
Claims & other policy benefits		—				—				—			—			—
Interest credited		—				—				—			—			—
Policy acquisition costs and other insurance expenses		—				—				—			—			—
Included in other comprehensive income		8,536				3,255				6,014			4,674			877
Purchases(1)		132,061				32,148				124,108			—			293
Sales(1)		(47,676		)		(744		)		(20,870		)	(14,626		)	—
Settlements(1)		(100,946		)		(12,573		)		(12,633		)	(542		)	(8,563		)
Transfers into Level 3		6,930				11,464				11,614			5,712			—
Transfers out of Level 3		(53,874		)		(1,743		)		(29,280		)	—			—
Fair value, end of period		$	1,287,940			$	185,547			$	556,160		$	97,914		$	32,994
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses		$	(2,336	)		$	94			$	2,005		$	875		$	(282	)
Investment related gains (losses), net		—				—				—			—			—
Claims & other policy benefits		—				—				—			—			—
Interest credited		—				—				—			—			—
Policy acquisition costs and other insurance expenses		—				—				—			—			—
For the six months ended June 30, 2014 (continued):		Fixed maturity securities
		available-for-sale
		State				Other foreign government, supranational and foreign government-sponsored enterprises				Funds withheld			Other invested assets- non-redeemable preferred stock			Interest sensitive contract liabilities embedded derivatives
		and political								at interest-
		subdivision								embedded
		securities								derivative
Fair value, beginning of period		$	43,776			$	37,997			$	(176,270	)	$	4,962		$	(868,725	)
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses		21				—				—			—			—
Investment related gains (losses), net		(8		)		—				156,076			—			(28,844		)
Claims & other policy benefits		—				—				—			—			—
Interest credited		—				—				—			—			(51,125		)
Policy acquisition costs and other insurance expenses		—				—				—			—			—
Included in other comprehensive income		2,443				33				—			—			—
Purchases(1)		—				—				—			—			(29,408		)
Sales(1)		—				—				—			—			—
Settlements(1)		(465		)		(599		)		—			—			37,866
Transfers into Level 3		—				—				—			—			—
Transfers out of Level 3		—				(26,543		)		—			(4,962		)	—
Fair value, end of period		$	45,767			$	10,888			$	(20,194	)	$	—		$	(940,236	)
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses		$	21			$	—			$	—		$	—		$	—
Investment related gains (losses), net		—				—				156,076			—			(30,156		)
Claims & other policy benefits		—				—				—			—			—
Interest credited		—				—				—			—			(88,991		)
Policy acquisition costs and other insurance expenses		—				—				—			—			—
-1	The amount reported within purchases, sales and settlements is the purchase price (for purchases) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased or sold/settled. Items purchased and sold/settled in the same period are excluded from the rollforward. The Company had no issuances during the period.
The tables below provide a summary of the changes in fair value of Level 3 assets and liabilities for the three and six months ended June 30, 2013, as well as the portion of gains or losses included in income for the three and six months ended June 30, 2013 attributable to unrealized gains or losses related to those assets and liabilities still held at June 30, 2013 (dollars in thousands):
For the three months ended June 30, 2013:		Fixed maturity securities - available-for-sale
		Corporate				Residential mortgage-backed securities				Asset-backed securities			Commercial mortgage-backed securities			State and political subdivision securities
		securities
Fair value, beginning of period		$	1,646,903			$	140,717			$	288,231		$	175,294		$	42,639
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses		(2,313		)		(111		)		1,526			581			9
Investment related gains (losses), net		350				198				226			(8,992		)	(4		)
Claims & other policy benefits		—				—				—			—			—
Interest credited		—				—				—			—			—
Policy acquisition costs and other insurance expenses		—				—				—			—			—
Included in other comprehensive income		(37,672		)		(2,714		)		2,601			15,445			(1,087		)
Purchases (1)		100,690				11,383				72,542			—			—
Sales(1)		(39,793		)		(1,018		)		(7,995		)	(1,118		)	—
Settlements(1)		(80,533		)		(7,367		)		(5,559		)	(228		)	(282		)
Transfers into Level 3		4,373				4,306				5,340			—			—
Transfers out of Level 3		—				(5,340		)		(4,306		)	—			—
Fair value, end of period		$	1,592,005			$	140,054			$	352,606		$	180,982		$	41,275
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses		$	(2,191	)		$	(112	)		$	1,515		$	580		$	9
Investment related gains (losses), net		—				—				—			(10,109		)	—
Claims & other policy benefits		—				—				—			—			—
Interest credited		—				—				—			—			—
Policy acquisition costs and other insurance expenses		—				—				—			—			—
		Fixed maturity securities - available-for-sale
For the three months ended June 30, 2013 (continued):		Other foreign government, supranational and foreign government-sponsored enterprises				Funds withheld				Short-term			Interest sensitive contract liabilities embedded derivatives
						at interest-				investments
						embedded
						derivatives
Fair value, beginning of period		$	27,865			$	(156,189	)		$	22,001		$	(890,476	)
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses		(76		)		—				—			—
Investment related gains (losses), net		—				47,716				—			35,809
Claims & other policy benefits		—				—				—			—
Interest credited		—				—				—			(28,020		)
Policy acquisition costs and other insurance expenses		—				—				—			—
Included in other comprehensive income		(959		)		—				(1		)	—
Purchases(1)		—				—				—			(14,764		)
Sales(1)		—				—				—			—
Settlements(1)		—				—				(22,000		)	18,883
Transfers into Level 3		—				—				—			—
Transfers out of Level 3		—				—				—			—
Fair value, end of period		$	26,830			$	(108,473	)		$	—		$	(878,568	)
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses		$	(76	)		$	—			$	—		$	—
Investment related gains (losses), net		—				47,717				—			34,788
Claims & other policy benefits		—				—				—			—
Interest credited		—				—				—			(46,902		)
Policy acquisition costs and other insurance expenses		—				—				—			—
For the six months ended June 30, 2013:		Fixed maturity securities - available-for-sale
		Corporate				Residential mortgage-backed securities				Asset-backed securities			Commercial mortgage-backed securities			U.S. Government and agencies securities			State and political subdivision securities
		securities
Fair value, beginning of period		$	1,668,563			$	93,931			$	232,391		$	167,006		$	4,538		$	43,212
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses		(4,339		)		(6		)		2,405			1,083			—			18
Investment related gains (losses), net		(913		)		25				(1,521		)	(9,862		)	—			(8		)
Claims & other policy benefits		—				—				—			—			—			—
Interest credited		—				—				—			—			—			—
Policy acquisition costs and other insurance expenses		—				—				—			—			—			—
Included in other comprehensive income		(36,710		)		(200		)		14,638			27,945			—			(1,639		)
Purchases (1)		175,362				51,920				128,423			—			—			—
Sales(1)		(56,071		)		(2,617		)		(16,293		)	(2,722		)	—			—
Settlements(1)		(145,899		)		(12,289		)		(11,436		)	(2,468		)	—			(308		)
Transfers into Level 3		8,146				14,630				8,305			—			—			—
Transfers out of Level 3		(16,134		)		(5,340		)		(4,306		)	—			(4,538		)	—
Fair value, end of period		$	1,592,005			$	140,054			$	352,606		$	180,982		$	—		$	41,275
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses		$	(4,218	)		$	(7	)		$	2,397		$	1,081		$	—		$	18
Investment related gains (losses), net		(202		)		—				—			(10,109		)	—			—
Claims & other policy benefits		—				—				—			—			—			—
Interest credited		—				—				—			—			—			—
Policy acquisition costs and other insurance expenses		—				—				—			—			—			—
		Fixed maturity securities - available-for-sale
For the six months ended June 30, 2013 (continued):		Other foreign government, supranational and foreign government-sponsored enterprises				Funds withheld				Short-term			Interest sensitive contract liabilities embedded derivatives
						at interest-				investments
						embedded
						derivatives
Fair value, beginning of period		$	28,280			$	(243,177	)		$	22,031		$	(912,361	)
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses		(150		)		—				(3		)	—
Investment related gains (losses), net		—				134,704				—			87,123
Claims & other policy benefits		—				—				—			—
Interest credited		—				—				—			(61,016		)
Policy acquisition costs and other insurance expenses		—				—				—			—
Included in other comprehensive income		(1,300		)		—				(28		)	—
Purchases(1)		—				—				—			(28,624		)
Sales(1)		—				—				—			—
Settlements(1)		—				—				(22,000		)	36,310
Transfers into Level 3		—				—				—			—
Transfers out of Level 3		—				—				—			—
Fair value, end of period		$	26,830			$	(108,473	)		$	—		$	(878,568	)
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses		$	(150	)		$	—			$	(4	)	$	—
Investment related gains (losses), net		—				134,705				—			84,911
Claims & other policy benefits		—				—				—			—
Interest credited		—				—				—			(97,326		)
Policy acquisition costs and other insurance expenses		—				—				—			—
-1	The amount reported within purchases, sales and settlements is the purchase price (for purchases) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased or sold/settled. Items purchased and sold/settled in the same period are excluded from the rollforward. The Company had no issuances during the period.
Nonrecurring Fair Value Measurements
The following table presents information for assets measured at estimated fair value on a nonrecurring basis during the periods presented; that is, they are not measured at fair value on a recurring basis but are subject to fair value adjustments only in certain circumstances (for example, when there is evidence of impairment). The estimated fair values for these assets were determined using significant unobservable inputs (Level 3).
		Carrying Value After Measurement								Net Investment Gains (Losses)
		At June 30,								Three months ended June 30,						Six months ended June 30,
(dollars in thousands)		2014				2013				2014			2013			2014			2013
Mortgage loans(1)		$	15,660			$	13,575			$	(2,037	)	$	(27	)	$	(1,656	)	$	93
Limited partnership interests(2)		8,889				9,161				(4,171		)	—			(4,171		)	(2,429		)
Real estate investments(3)		—				4,136				—			(600		)	—			(600		)
-1	Mortgage loans — The impaired mortgage loans presented above were written down to their estimated fair values at the date the impairments were recognized and are reported as losses above. Subsequent improvements in estimated fair value on previously impaired loans recorded through a reduction in the previously established valuation allowance are reported as gains above. Nonrecurring fair value adjustments on mortgage loans are based on the fair value of underlying collateral or discounted cash flows.
-2	Limited partnership interests — The impaired limited partnership interests presented above were accounted for using the cost method. Impairments on these cost method investments were recognized at estimated fair value determined using the net asset values of the Company’s ownership interest as provided in the financial statements of the investees. The market for these investments has limited activity and price transparency.
-3	Real estate investments — The impaired real estate investments presented above were written down to their estimated fair value at the date of impairment and are reported as losses above. The impairments were based on third-party appraisal values obtained and reviewed by the Company.
Fair Value of Financial Instruments
The Company is required by general accounting principles for Fair Value Measurements and Disclosures to disclose the fair value of certain financial instruments including those that are not carried at fair value. The following table presents the carrying amounts and estimated fair values of the Company’s financial instruments, which were not measured at fair value on a recurring basis, at June 30, 2014 and December 31, 2013 (dollars in thousands):
June 30, 2014:		Carrying Value				Estimated				Fair Value Measurement Using:
						Fair Value				Level 1			Level 2			Level 3
Assets:
Mortgage loans on real estate		$	2,555,800			$	2,654,439			$	—		$	—		$	2,654,439
Policy loans		1,250,635				1,250,635				—			1,250,635			—
Funds withheld at interest(1)		5,958,657				6,377,951				—			—			6,377,951
Cash and cash equivalents(2)		861,319				861,319				861,319			—			—
Short-term investments(2)		23,894				23,894				23,894			—			—
Other invested assets(2)		460,905				509,067				5,216			38,446			465,405
Accrued investment income		279,368				279,368				—			279,368			—
Liabilities:
Interest-sensitive contract liabilities(1)		$	9,890,923			$	9,818,666			$	—		$	—		$	9,818,666
Short-term debt		110,000				110,000				—			110,000			—
Long-term debt		2,214,705				2,438,495				—			—			2,438,495
Collateral finance facility		482,092				377,403				—			—			377,403
December 31, 2013:		Carrying Value				Estimated				Fair Value Measurement Using:
						Fair Value				Level 1			Level 2			Level 3
Assets:
Mortgage loans on real estate		$	2,486,680			$	2,489,721			$	—		$	—		$	2,489,721
Policy loans		1,244,469				1,244,469				—			1,244,469			—
Funds withheld at interest(1)		5,948,374				6,207,342				—			—			6,207,342
Cash and cash equivalents(2)		552,302				552,302				552,302			—			—
Short-term investments(2)		27,823				27,823				27,823			—			—
Other invested assets(2)		491,545				534,442				5,070			33,886			495,486
Accrued investment income		267,908				267,908				—			267,908			—
Liabilities:
Interest-sensitive contract liabilities(1)		$	10,228,120			$	9,989,514			$	—		$	—		$	9,989,514
Long-term debt		2,214,350				2,333,023				—			—			2,333,023
Collateral finance facility		484,752				374,984				—			—			374,984
-1	Carrying values presented herein differ from those presented in the condensed consolidated balance sheets because certain items within the respective financial statement caption are embedded derivatives and are measured at fair value on a recurring basis.
-2	Carrying values presented herein differ from those presented in the condensed consolidated balance sheets because certain items within the respective financial statement caption are measured at fair value on a recurring basis.
Mortgage Loans on Real Estate – The fair value of mortgage loans on real estate is estimated by discounting cash flows, both principal and interest, using current interest rates for mortgage loans with similar credit ratings and similar remaining maturities. As such, inputs include current treasury yields and spreads, which are based on the credit rating and average life of the loan, corresponding to the market spreads. The valuation of mortgage loans on real estate is considered Level 3 in the fair value hierarchy.
Policy Loans – Policy loans typically carry an interest rate that is adjusted annually based on an observable market index and therefore carrying value approximates fair value. The valuation of policy loans is considered Level 2 in the fair value hierarchy.
Funds Withheld at Interest – The carrying value of funds withheld at interest approximates fair value except where the funds withheld are specifically identified in the agreement. When funds withheld are specifically identified in the agreement, the fair value is based on the fair value of the underlying assets which are held by the ceding company. Ceding companies use a variety of sources and pricing methodologies, which are not transparent to the Company and may include significant unobservable inputs, to value the securities that are held in distinct portfolios, therefore the valuation of these funds withheld assets are considered Level 3 in the fair value hierarchy.
Cash and Cash Equivalents and Short-term Investments – The carrying values of cash and cash equivalents and short-term investments approximates fair values due to the short-term maturities of these instruments and are considered Level 1 in the fair value hierarchy.
Other Invested Assets – This primarily includes limited partnership interests accounted for using the cost method, structured loans, FHLB common stock and cash collateral. The fair value of limited partnerships and other investments accounted for using the cost method is determined using the net asset values of the Company’s ownership interest as provided in the financial statements of the investees. The valuation of these investments is considered Level 3 in the fair value hierarchy due to the limited activity and price transparency inherent in the market for such investments. The fair value of structured loans is estimated based on a discounted cash flow analysis using discount rates applicable to each structured loan, this is considered Level 3 in the fair value hierarchy. The fair value of the Company’s common stock investment in the Federal Home Loan Bank of Des Moines is considered to be the carrying value and it is considered Level 2 in the fair value hierarchy. The fair value of the Company's cash collateral is considered to be the carrying value and considered to be Level 1 in the fair value hierarchy.
Accrued Investment Income – The carrying value for accrued investment income approximates fair value as there are no adjustments made to the carrying value. This is considered Level 2 in the fair value hierarchy.
Interest-Sensitive Contract Liabilities – The carrying and fair values of interest-sensitive contract liabilities reflected in the table above exclude contracts with significant mortality risk. The fair value of the Company’s interest-sensitive contract liabilities utilizes a market standard technique with both capital market inputs and policyholder behavior assumptions, as well as cash values adjusted for recapture fees. The capital market inputs to the model, such as interest rates, are generally observable. Policyholder behavior assumptions are generally not observable and may require use of significant management judgment. The valuation of interest-sensitive contract liabilities is considered Level 3 in the fair value hierarchy.
Short-term Debt – The carrying amount of short-term debt approximates its fair value because of the relatively short time between origination of the debt instrument and its maturity, which is reflected in Level 2.
Long-term Debt and Collateral Finance Facility – The fair value of the Company’s long-term debt and collateral finance facility is generally estimated by discounting future cash flows using market rates currently available for debt with similar remaining maturities and reflecting the credit risk of the Company, including inputs when available, from actively traded debt of the Company or other companies with similar credit quality. The valuation of long-term debt and collateral finance facility are generally obtained from brokers and are considered Level 3 in the fair value hierarchy.

Segment_Information

Segment Information	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
Segment Information	'
	Segment Information
	Effective January 1, 2014, the Company realigned certain operations and management responsibilities to better fit within its geographic-based segments. Operations in Mexico and Latin America have been moved from Europe & South Africa to the U.S. segment, which has been renamed U.S. and Latin America. Operations in India have been moved from Europe & South Africa to the Asia Pacific segment. The Europe & South Africa segment has been renamed Europe, Middle East and Africa. Prior-period amounts have been adjusted to conform to the new segment reporting structure.
	The accounting policies of the segments are the same as those described in the Summary of Significant Accounting Policies in Note 2 of the consolidated financial statements accompanying the 2013 Annual Report. The Company measures segment performance primarily based on profit or loss from operations before income taxes. There are no intersegment reinsurance transactions and the Company does not have any material long-lived assets. Investment income is allocated to the segments based upon average assets and related capital levels deemed appropriate to support the segment business volumes.
	The Company allocates capital to its segments based on an internally developed economic capital model, the purpose of which is to measure the risk in the business and to provide a basis upon which capital is deployed. The economic capital model considers the unique and specific nature of the risks inherent in the Company’s businesses. As a result of the economic capital allocation process, a portion of investment income and investment related gains and losses are attributed to the segments based on the level of allocated capital. In addition, the segments are charged for excess capital utilized above the allocated economic capital basis. This charge is included in policy acquisition costs and other insurance expenses.
	The Company’s reportable segments are strategic business units that are primarily segregated by geographic region. Information related to revenues, income (loss) before income taxes and total assets of the Company for each reportable segment are summarized below (dollars in thousands).
		Three months ended June 30,						Six months ended June 30,
	Total revenues:	2014			2013			2014			2013
	U.S. and Latin America:
	Traditional	$	1,333,027		$	1,275,331		$	2,611,719		$	2,472,255
	Non-Traditional	293,448			301,991			582,069			616,091
	Canada	309,113			295,325			586,862			592,414
	Europe, Middle East and Africa	391,318			310,169			757,175			617,756
	Asia Pacific	483,171			383,978			898,200			793,829
	Corporate and Other	22,943			23,848			54,168			99,399
	Total	$	2,833,020		$	2,590,642		$	5,490,193		$	5,191,744
		Three months ended June 30,						Six months ended June 30,
	Income (loss) before income taxes:	2014			2013			2014			2013
	U.S. and Latin America:
	Traditional	$	93,988		$	90,213		$	144,960		$	169,756
	Non-Traditional	95,474			80,996			178,598			178,560
	Canada	35,020			35,659			55,084			71,967
	Europe, Middle East and Africa	61,322			11,949			76,527			22,912
	Asia Pacific	34,928			(287,345		)	61,239			(269,103		)
	Corporate and Other	(20,197		)	(6,230		)	(16,433		)	29,977
	Total	$	300,535		$	(74,758	)	$	499,975		$	204,069
	Total Assets:	30-Jun-13			31-Dec-13
	U.S. and Latin America:
	Traditional	$	13,659,119		$	13,285,423
	Non-Traditional	11,706,053			11,716,908
	Canada	4,074,727			4,103,730
	Europe, Middle East and Africa	4,407,325			2,230,568
	Asia Pacific	3,817,197			3,597,456
	Corporate and Other	5,506,630			4,740,388
	Total	$	43,171,051		$	39,674,473

Commitments_and_Contingent_Lia

Commitments and Contingent Liabilities	6 Months Ended
	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingent Liabilities	'
	Commitments and Contingent Liabilities
	The Company's commitments to fund investments as of June 30, 2014 and December 31, 2013 are presented in the following table (dollars in millions):
		June 30, 2014				December 31, 2013
	Limited partnerships	$	291.1			$	239.5
	Commercial mortgage loans	61.6				4.6
	Private placements	14				22
	Bank loans and revolving credit agreements	57.8				37
	The Company anticipates that the majority of its current commitments will be invested over the next five years; however, these commitments could become due any time at the request of the counterparties. Investments in limited partnerships and private placements are carried at cost or reported using the equity method and included in other invested assets in the condensed consolidated balance sheets. Bank loans are carried at fair value and included in fixed maturities available-for-sale.
	The Company is subject to litigation in the normal course of its business. The Company currently has no material litigation. A legal reserve is established when the Company is notified of an arbitration demand or litigation or is notified that an arbitration demand or litigation is imminent, it is probable that the Company will incur a loss as a result and the amount of the probable loss is reasonably capable of being estimated.
	The Company has obtained bank letters of credit in favor of various affiliated and unaffiliated insurance companies from which the Company assumes business. These letters of credit represent guarantees of performance under the reinsurance agreements and allow ceding companies to take statutory reserve credits. Certain of these letters of credit contain financial covenant restrictions. At June 30, 2014 and December 31, 2013, there were approximately $212.5 million and $210.3 million, respectively, of undrawn outstanding bank letters of credit in favor of third parties. Additionally, the Company utilizes letters of credit primarily to secure reserve credits when it retrocedes business to its subsidiaries, including Parkway Reinsurance Company (“Parkway Re”), Rockwood Reinsurance Company (“Rockwood Re”), Timberlake Financial L.L.C. (“Timberlake Financial”), RGA Americas Reinsurance Company, Ltd. (“RGA Americas”), RGA Reinsurance Company (Barbados) Ltd. (“RGA Barbados”) and RGA Atlantic Reinsurance Company Ltd. (“RGA Atlantic”). The Company cedes business to its affiliates to help reduce the amount of regulatory capital required in certain jurisdictions such as the U.S. and the United Kingdom. The capital required to support the business in the affiliates reflects more realistic expectations than the original jurisdiction of the business, where capital requirements are often considered to be quite conservative. As of June 30, 2014 and December 31, 2013, $1,137.7 million and $995.5 million, respectively, in undrawn letters of credit from various banks were outstanding, primarily backing reinsurance between the various subsidiaries of the Company. The banks providing letters of credit to the Company are included on the National Association of Insurance Commissioners (“NAIC”) list of approved banks.
	The Company maintains nine credit facilities, a syndicated revolving credit facility with a capacity of $850.0 million and eight letter of credit facilities with a combined capacity of $1,080.5 million. The Company may borrow cash and obtain letters of credit in multiple currencies under its syndicated revolving credit facility. The following table provides additional information on the Company’s credit facilities as of June 30, 2014 and December 31, 2013 (dollars in millions):
							Amount Utilized(1)
	Facility Capacity				Maturity Date		30-Jun-14		31-Dec-13		Basis of Fees
	$	850			December 2015		$	230.6	$	67.6	Senior unsecured long-term debt rating
	200				September 2019		200		200		Fixed
	120				May-16		80		85.1		Fixed
	270				Nov-17		270		270		Fixed
	100				Jun-17		89		89.4		Fixed
	88.2(2)				Nov-14		88.2		58.4		Fixed
	105.1(2)				Mar-19		105.1		132.5		Fixed
	150				Jun-16		—		—		Fixed
	47.2(2)				May-16		—		—		Fixed
	-1	Represents issued but undrawn letters of credit. There was no cash borrowed for the periods presented.
	-2	Foreign currency facility, U.S. dollar amount may vary.
	RGA has issued guarantees to third parties on behalf of its subsidiaries for the payment of amounts due under certain reinsurance treaties, securities borrowing arrangements, financing arrangements and office lease obligations, whereby, if a subsidiary fails to meet an obligation, RGA or one of its other subsidiaries will make a payment to fulfill the obligation. In limited circumstances, treaty guarantees are granted to ceding companies in order to provide them additional security, particularly in cases where RGA’s subsidiary is relatively new, unrated, or not of a significant size, relative to the ceding company. Liabilities supported by the treaty guarantees, before consideration for any legally offsetting amounts due from the guaranteed party are reflected on the Company’s condensed consolidated balance sheets in future policy benefits. Potential guaranteed amounts of future payments will vary depending on production levels and underwriting results. Guarantees related to borrowed securities provide additional security to third parties should a subsidiary fail to return the borrowed securities when due. RGA’s guarantees issued as of June 30, 2014 and December 31, 2013 are reflected in the following table (dollars in millions):
		June 30, 2014				December 31, 2013
	Treaty guarantees	$	966.9			$	826.9
	Treaty guarantees, net of assets in trust	776.7				647.9
	Borrowed securities	187.7				93
	Financing arrangements	—				—
	Lease obligations	7.6				8.3
	Manor Reinsurance, Ltd. (“Manor Re”), a subsidiary of RGA, has obtained $300.0 million of collateral financing through 2020 from an international bank which enabled Manor Re to deposit assets in trust to support statutory reserve credits for an affiliated reinsurance transaction. The bank has recourse to RGA should Manor Re fail to make payments or otherwise not perform its obligations under this financing.
	RGA, through wholly-owned subsidiaries, has committed to provide statutory reserve support to third-parties, in exchange for a fee, by funding loans if certain defined events occur. Such statutory reserves are required under the U.S. Valuation of Life Policies Model Regulation (commonly referred to as Regulation XXX for term life insurance policies and Regulation A-XXX for universal life secondary guarantees). The third-parties have recourse to RGA should the subsidiary fail to provide the required funding, however, as of June 30, 2014, the Company does not believe that it will be required to provide any funding under these commitments as the occurrence of the defined events is considered remote. The following table presents information about these commitments (dollars in millions):
			Maximum Potential Obligation
	Commitment Period		30-Jun-14				31-Dec-13
	2026		$	500			$	500
	2033		1,850.00				1,350.00
	2034		2,000.00				—
	2036		1,250.00				1,250.00
	In addition, the Company indemnifies its directors and officers as provided in its charters and by-laws. Since this indemnity generally is not subject to limitation with respect to duration or amount, the Company does not believe that it is possible to determine the maximum potential amount due under this indemnity in the future.

Employee_Benefit_Plans

Employee Benefit Plans	6 Months Ended
	Jun. 30, 2014
Compensation and Retirement Disclosure [Abstract]	'
Employee Benefit Plans	'
	Employee Benefit Plans
	The components of net periodic benefit costs for the three and six months ended June 30, 2014 and 2013 were as follows (dollars in thousands):
		Pension Benefits						Other Benefits
		Three months ended June 30,						Three months ended June 30,
		2014			2013			2014		2013
	Service cost	$	2,489		$	2,129		$	470	$	410
	Interest Cost	1,487			1,020			339		311
	Expected return on plan assets	(1,302		)	(1,100		)	—		—
	Amortization of prior service cost	216			213			—		—
	Amortization of prior actuarial loss	245			782			217		186
	Net periodic benefit cost	$	3,135		$	3,044		$	1,026	$	907
		Pension Benefits						Other Benefits
		Six months ended June 30,						Six months ended June 30,
		2014			2013			2014		2013
	Service cost	$	3,990		$	4,012		$	940	$	820
	Interest Cost	2,295			2,038			677		623
	Expected return on plan assets	(2,235		)	(1,867		)	—		—
	Amortization of prior service cost	218			307			—		—
	Amortization of prior actuarial loss	918			1,619			434		372
	Net periodic benefit cost	$	5,186		$	6,109		$	2,051	$	1,815
	The Company has made pension contributions of $3.3 million during the first six months of 2014, and expects to make total pension contributions of $6.5 million in 2014.

Equity_Based_Compensation

Equity Based Compensation	6 Months Ended
	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Equity Based Compensation	'
	Equity Based Compensation
	Equity compensation expense was $6.4 million and $6.0 million in the second quarter of 2014 and 2013, respectively. In the first quarter of 2014, the Company granted 0.3 million stock appreciation rights at $78.48 weighted average exercise price per share and 0.2 million performance contingent units to employees. Additionally, non-employee directors were granted a total of 15,925 shares of common stock. As of June 30, 2014, 1.9 million share options at $50.82 weighted average per share were vested and exercisable with a remaining weighted average exercise period of 5.1 years. As of June 30, 2014, the total compensation cost of non-vested awards not yet recognized in the condensed consolidated financial statements was $36.5 million. It is estimated that these costs will vest over a weighted average period of 2.1 years.
	Effective with the 2014 grants, certain eligible associates were granted a greater portion of equity awards in performance contingent units, while others were granted a greater portion of awards settled in cash. This change increases the performance based nature of the awards while reducing share issuance.

Retrocession_Arrangements_and_

Retrocession Arrangements and Reinsurance Ceded Receivables	6 Months Ended
	Jun. 30, 2014
Retrocession Arrangements And Reinsurance Ceded Receivables [Abstract]	'
Retrocession Arrangements and Reinsurance Ceded Receivables	'
	Retrocession Arrangements and Reinsurance Ceded Receivables
	The Company generally reports retrocession activity on a gross basis. Amounts paid or deemed to have been paid for reinsurance are reflected in reinsurance ceded receivables. The cost of reinsurance related to long-duration contracts is recognized over the terms of the reinsured policies on a basis consistent with the reporting of those policies.
	Retrocession reinsurance treaties do not relieve the Company from its obligations to direct writing companies. Failure of retrocessionaires to honor their obligations could result in losses to the Company. Consequently, allowances would be established for amounts deemed uncollectible. At June 30, 2014 and December 31, 2013, no allowances were deemed necessary. The Company regularly evaluates the financial condition of the insurance companies from which it assumes and to which it cedes reinsurance.
	Retrocessions are arranged through the Company’s retrocession pools for amounts in excess of the Company’s retention limit. As of June 30, 2014 and December 31, 2013, all rated retrocession pool participants followed by the A.M. Best Company were rated “A- (excellent)” or better. The Company verifies retrocession pool participants’ ratings on a quarterly basis. For a majority of the retrocessionaires that were not rated, security in the form of letters of credit or trust assets has been given as additional security. In addition, the Company performs annual financial reviews of its retrocessionaires to evaluate financial stability and performance. In addition to its third party retrocessionaires, various RGA reinsurance subsidiaries retrocede amounts in excess of their retention to RGA Reinsurance Company ("RGA Reinsurance"), Parkway Re, RGA Barbados, RGA Americas, Rockwood Re, Manor Re, RGA Worldwide Reinsurance Company, Ltd. ("RGA Worldwide") or RGA Atlantic.
	At June 30, 2014, the Company had $614.2 million of ceded reinsurance receivables, of which $367.3 million, or 59.8%, were with the Company’s four largest retrocessionaires. Included in the June 30, 2014 total ceded reinsurance receivables balance were $155.1 million of claims recoverable, of which $7.4 million were in excess of 90 days past due. At December 31, 2013, the Company had $594.5 million of ceded reinsurance receivables, of which $359.2 million, or 60.4%, were with the Company’s four largest retrocessionaires. Included in the December 31, 2013 total ceded reinsurance receivables balance were $134.1 million of claims recoverable, of which $4.2 million were in excess of 90 days past due.

Stock_Transactions

Stock Transactions	6 Months Ended
	Jun. 30, 2014
Financing Activities And Stock Transactions [Abstract]	'
Stock Transactions	'
	Stock Transactions
	On February 20, 2014, RGA’s board of directors authorized a share repurchase program for up to $300.0 million of RGA’s outstanding common stock. The authorization was effective immediately and does not have an expiration date. Repurchases are made in accordance with applicable securities laws through market transactions, block trades, privately negotiated transactions or other means or a combination of these methods, with the timing and number of shares repurchased dependent on a variety of factors, including share price, corporate and regulatory requirements and market and business conditions. Repurchases may be commenced or suspended from time to time without prior notice. In connection with this new authorization, the board of directors terminated the stock repurchase authority granted in 2013.
	During the first quarter of 2014, RGA repurchased 1,449,293 shares of common stock under this program for $112.6 million. The common shares repurchased have been placed into treasury to be used for general corporate purposes. During the second quarter of 2014, RGA repurchased 818,515 shares of common stock under this program for $64.1 million. The common shares repurchased have been placed into treasury to be used for general corporate purposes. As of June 30, 2014 there was $123.3 million remaining under the board of directors authorized share repurchase program.

New_Accounting_Standards

New Accounting Standards	6 Months Ended
	Jun. 30, 2014
Accounting Changes and Error Corrections [Abstract]	'
New Accounting Standards	'
	New Accounting Standards
	Changes to the general accounting principles are established by the Financial Accounting Standards Board ("FASB") in the form of accounting standards updates to the FASB Accounting Standards Codification™. Accounting standards updates not listed below were assessed and determined to be either not applicable or are expected to have minimal impact on the Company’s condensed consolidated financial statements.
	Adoption of New Accounting Standards
	Basis of Presentation
	In December 2011, the FASB amended the general accounting principles for Balance Sheet as it relates to the disclosures about offsetting assets and liabilities. The amendment requires disclosures about the Company’s rights of offset and related arrangements associated with its financial instruments and derivative instruments. This amendment also requires the disclosure of both gross and net information about both instruments and transactions eligible for offset in the balance sheet and instruments and transactions subject to an agreement similar to a master netting arrangement. In January 2013, the FASB amended the general accounting principles for Balance Sheet as it relates to the disclosures about offsetting assets and liabilities. This amendment clarifies that the scope of the Balance Sheet amendment made in December 2011 applies only to derivatives, including bifurcated embedded derivatives, repurchase and reverse repurchase agreements, and securities borrowing and lending transactions that are either offset or subject to an enforceable master netting agreement or a similar agreement. These amendments are effective for interim and annual reporting periods beginning on or after January 1, 2013. The Company adopted these amendments and the required disclosures are provided in Note 5 — “Derivative Instruments”.
	Income Taxes
	In July 2013, the FASB amended the general accounting principles for Income Taxes as it relates to the presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. This amendment clarifies that an unrecognized tax benefit should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. However, to the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available to settle any additional income taxes that would result from the disallowance of a tax position or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and not combined with deferred tax assets.  These amendments are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. The adoption of this amendment did not have an impact on the Company's condensed consolidated financial statements.
	Comprehensive Income
	In February 2013, the FASB amended the general accounting principles for Comprehensive Income as it relates to the reporting of amounts reclassified out of accumulated other comprehensive income. The amendment requires entities to provide information about the amounts reclassified out of accumulated other comprehensive income by component. This amendment also requires entities to present, either on the face of the statement where net income is presented or in the notes, significant amounts reclassified out of accumulated other comprehensive income by the respective line items of net income. However, this is only necessary if the amount reclassified is required to be reclassified to net income in its entirety in the same reporting period. The amendment is effective for interim and annual reporting periods beginning after December 15, 2012. The Company adopted this amendment and the required disclosures are provided in Note 3 — “Accumulated Other Comprehensive Income.”
	Future Adoption of New Accounting Standards
	Compensation
	In June 2014, the FASB amended the general accounting principles for Compensation as it relates to the accounting for share-based payments when the terms of an award provide that a performance target could be achieved after the requisite service period. This amendment requires that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. The amendment further clarifies that the performance target should not be reflected in estimating the grant-date fair value of the award and that compensation cost should be recognized in the period in which it becomes probable that the performance target will be achieved. These amendments are effective for annual years, and interim periods within those years, beginning after December 15, 2015. The Company is currently evaluating the impact of this amendment on its condensed consolidated financial statements.
	Transfers and Servicing
	In June 2014, the FASB amended the general accounting principles for Transfers and Servicing as it relates to the accounting for repurchase-to-maturity transactions, repurchase financings, and disclosures. This amendment requires entities to account for repurchase-to-maturity transactions as secured borrowings, eliminates guidance on linked repurchase financing transactions, and expands disclosure requirements related to certain transfers of financial assets that are accounted for as sales and certain transfers accounted for as secured borrowings. These amendments are effective for annual years, and interim periods within those years, beginning after December 15, 2014.The Company is currently evaluating the impact of this amendment on its condensed consolidated financial statements.

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Schedule Of Earnings Per Share Basic And Diluted By Common Class [Text Block]	'
	The following table sets forth the computation of basic and diluted earnings per share on net income (loss) (in thousands, except per share information):
		Three months ended June 30,					Six months ended June 30,
		2014		2013			2014		2013
	Earnings:
	Net income (loss) (numerator for basic and diluted calculations)	$	198,296	$	(49,612	)	$	334,960	$	135,923
	Shares:
	Weighted average outstanding shares (denominator for basic calculation)	69,076		72,350			69,823		73,089
	Equivalent shares from outstanding stock options	642		—			666		484
	Denominator for diluted calculation	69,718		72,350			70,489		73,573
	Earnings per share:
	Basic	$	2.87	$	(0.69	)	$	4.8	$	1.86
	Diluted	$	2.84	$	(0.69	)	$	4.75	$	1.85

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Tables)	6 Months Ended
	Jun. 30, 2014
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]	'
Components of Accumulated Other Comprehensive Income	'
	The balance of and changes in each component of accumulated other comprehensive income (loss) (“AOCI”) for the six months ended June 30, 2014 and 2013 are as follows (dollars in thousands):
			Accumulated Other Comprehensive Income (Loss), Net of Income Tax
			Accumulated			Unrealized			Pension and				Total
			Currency			Appreciation			Postretirement
			Translation			(Depreciation)			Benefits
			Adjustments			of Investments(1)
	Balance, December 31, 2013		$	207,083		$	820,245		$	(21,721	)		$	1,005,607
	Other comprehensive income (loss) before reclassifications		(40		)	646,777			(6		)		646,731
	Amounts reclassified to (from) AOCI		—			(24,698		)	1,020				(23,678		)
	Net current-period other comprehensive income (loss)		(40		)	622,079			1,014				623,053
	Balance, June 30, 2014		$	207,043		$	1,442,324		$	(20,707	)		$	1,628,660
			Accumulated Other Comprehensive Income (Loss), Net of Income Tax
			Accumulated			Unrealized			Pension and				Total
			Currency			Appreciation			Postretirement
			Translation			(Depreciation)			Benefits
			Adjustments			of Investments(1)
	Balance, December 31, 2012		$	267,475		$	1,877,657		$	(36,230	)		$	2,108,902
	Other comprehensive income (loss) before reclassifications		(102,937		)	(819,019		)	206				(921,750		)
	Amounts reclassified to (from) AOCI		—			(6,512		)	1,494				(5,018		)
	Net current-period other comprehensive income (loss)		(102,937		)	(825,531		)	1,700				(926,768		)
	Balance, June 30, 2013		$	164,538		$	1,052,126		$	(34,530	)		$	1,182,134
	-1	Includes cash flow hedges. See Note 5 - “Derivative Instruments” for additional information on cash flow hedges.
Reclassification Out Of Accumulated Other Comprehensive Income	'
	The following table presents the amounts of AOCI reclassifications for the three and six months ended June 30, 2014 and 2013 (dollars in thousands):
			Amount Reclassified from AOCI
			Three months ended June 30,							Six months ended June 30,
	Details about AOCI Components		2014			2013				2014				2013			Affected Line Item in Statement of Income
	Unrealized gains and losses on available-for-sale securities		$	27,142		$	13,510			$	28,331			$	23,858		Investment related gains (losses), net
	Gains and losses on cash flow hedge - interest rate swap		321			201				539				506			Investment income
	Deferred policy acquisition costs attributed to unrealized gains and losses(1)		4,370			(13,283		)		8,791				(14,831		)
	Total		31,833			428				37,661				9,533
	Provision for income taxes		(11,059		)	(87		)		(12,963		)		(3,021		)
	Net unrealized gains (losses), net of tax		$	20,774		$	341			$	24,698			$	6,512
	Amortization of unrealized pension and postretirement benefits:
	Prior service cost(2)		$	(216	)	$	(213	)		$	(218	)		$	(307	)
	Actuarial gains/(losses)(2)		(462		)	(968		)		(1,352		)		(1,991		)
	Total		(678		)	(1,181		)		(1,570		)		(2,298		)
	Provision for income taxes		238			413				550				804
	Amortization of unrealized pension and postretirement benefits, net of tax		$	(440	)	$	(768	)		$	(1,020	)		$	(1,494	)
	Total reclassifications, net of tax		$	20,334		$	(427	)		$	23,678			$	5,018
	-1	This AOCI component is included in the computation of the deferred policy acquisition cost. See Note 8 – “Deferred Policy Acquisition Costs” of the 2013 Annual Report for additional details.
	-2	These AOCI components are included in the computation of the net periodic pension cost. See Note 9 – “Employee Benefit Plans” for additional details.

Investments_Tables

Investments (Tables)	6 Months Ended
	Jun. 30, 2014
Investments [Abstract]	'
Available For Sale Securities	'
	The following tables provide information relating to investments in fixed maturity and equity securities by sector as of June 30, 2014 and December 31, 2013 (dollars in thousands):
	June 30, 2014:		Amortized				Unrealized				Unrealized				Estimated Fair			% of		Other-than-
																				temporary impairments
			Cost				Gains				Losses				Value			Total		in AOCI
	Available-for-sale:
	Corporate securities		$	13,280,721			$	932,793			$	62,103			$	14,151,411		57.8	%	$	—
	Canadian and Canadian provincial governments		2,786,873				964,710				3,945				3,747,638			15.3		—
	Residential mortgage-backed securities		946,431				49,676				9,968				986,139			4.1		(300		)
	Asset-backed securities		993,116				24,314				9,055				1,008,375			4.1		354
	Commercial mortgage-backed securities		1,380,622				103,032				9,034				1,474,620			6		(1,609		)
	U.S. government and agencies		429,215				20,987				1,696				448,506			1.8		—
	State and political subdivisions		369,515				42,553				4,581				407,487			1.7		—
	Other foreign government, supranational and foreign government-sponsored enterprises		2,186,853				78,730				9,363				2,256,220			9.2		—
	Total fixed maturity securities		$	22,373,346			$	2,216,795			$	109,745			$	24,480,396		100	%	$	(1,555	)
	Non-redeemable preferred stock		$	81,240			$	7,165			$	1,567			$	86,838		61.7	%
	Other equity securities		53,833				1,063				990				53,906			38.3
	Total equity securities		$	135,073			$	8,228			$	2,557			$	140,744		100	%
	December 31, 2013:		Amortized				Unrealized				Unrealized				Estimated Fair			% of		Other-than-
																				temporary impairments
			Cost				Gains				Losses				Value			Total		in AOCI
	Available-for-sale:
	Corporate securities		$	11,697,394			$	616,147			$	202,786			$	12,110,755		56.4	%	$	—
	Canadian and Canadian provincial governments		2,728,111				669,762				16,848				3,381,025			15.7		—
	Residential mortgage-backed securities		970,434				38,126				18,917				989,643			4.6		(300		)
	Asset-backed securities		891,751				18,893				15,812				894,832			4.2		(2,259		)
	Commercial mortgage-backed securities		1,314,782				91,651				17,487				1,388,946			6.5		(1,609		)
	U.S. government and agencies		489,631				16,468				4,748				501,351			2.3		—
	State and political subdivisions		313,252				21,907				14,339				320,820			1.5		—
	Other foreign government, supranational and foreign government-sponsored enterprises		1,865,379				45,347				23,962				1,886,764			8.8		—
	Total fixed maturity securities		$	20,270,734			$	1,518,301			$	314,899			$	21,474,136		100	%	$	(4,168	)
	Non-redeemable preferred stock		$	81,993			$	5,342			$	5,481			$	81,854		20.2	%
	Other equity securities		327,479				618				4,220				323,877			79.8
	Total equity securities		$	409,472			$	5,960			$	9,701			$	405,731		100	%
Investments Classified By Contractual Maturity Date	'
	The amortized cost and estimated fair value of fixed maturity securities available-for-sale at June 30, 2014 are shown by contractual maturity in the table below (dollars in thousands). Actual maturities can differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Asset and mortgage-backed securities are shown separately in the table below, as they are not due at a single maturity date.
			Amortized				Fair
			Cost				Value
	Available-for-sale:
	Due in one year or less		$	637,052			$	644,928
	Due after one year through five years		4,116,731				4,358,370
	Due after five years through ten years		7,415,405				7,871,893
	Due after ten years		6,883,989				8,136,071
	Asset and mortgage-backed securities		3,320,169				3,469,134
	Total		$	22,373,346			$	24,480,396
Fixed Maturity Holdings Industry Types Weighted Average Credit Ratings [Table Text Block]	'
	The tables below show the major industry types of the Company’s corporate fixed maturity holdings as of June 30, 2014 and December 31, 2013 (dollars in thousands):
	June 30, 2014:						Estimated
			Amortized Cost				Fair Value				% of Total
	Finance		$	4,512,831			$	4,788,259			33.8	%
	Industrial		7,240,086				7,729,309				54.6
	Utility		1,516,641				1,622,357				11.5
	Other		11,163				11,486				0.1
	Total		$	13,280,721			$	14,151,411			100	%
	December 31, 2013:						Estimated
			Amortized Cost				Fair Value				% of Total
	Finance		$	3,838,716			$	3,983,623			32.9	%
	Industrial		6,607,100				6,824,063				56.3
	Utility		1,240,353				1,292,305				10.7
	Other		11,225				10,764				0.1
	Total		$	11,697,394			$	12,110,755			100	%
RollForward Of Cumulative Credit Loss Component Of OTTI Income Loss	'
	The following table sets forth the amount of pre-tax credit loss impairments on fixed maturity securities held by the Company as of the dates indicated, for which a portion of the OTTI loss was recognized in AOCI, and the corresponding changes in such amounts (dollars in thousands):
			Three months ended June 30,
			2014				2013
	Balance, beginning of period		$	11,696			$	14,773
	Credit loss OTTI previously recognized on securities impaired to fair value during the period		—				(1,449		)
	Credit loss OTTI previously recognized on securities which matured, paid down, prepaid or were sold during the period		(4,412		)		—
	Balance, end of period		$	7,284			$	13,324
			Six months ended June 30,
			2014				2013
	Balance, beginning of period		$	11,696			$	16,675
	Credit loss OTTI previously recognized on securities impaired to fair value during the period		—				(1,449		)
	Credit loss OTTI previously recognized on securities which matured, paid down, prepaid or were sold during the period		(4,412		)		(1,902		)
	Balance, end of period		$	7,284			$	13,324
Accounting for Certain Loans and Debt Securities Acquired in Transfer Disclosure [Text Block]	'
	The following tables present information on the Company’s purchased credit impaired securities, which are included in fixed maturity securities available-for-sale (dollars in thousands):
			30-Jun-14				31-Dec-13
	Outstanding principal and interest balance(1)		$	213,901			$	192,644
	Carrying value, including accrued interest(2)		175,604				148,822
	-1	Represents the contractually required payments which is the sum of contractual principal, whether or not currently due, and accrued interest.
	-2	Estimated fair value plus accrued interest.
Schedule Of Certain Loans Acquired In Transfer Accounted For As Available For Sale Debt Securities At Acquisition Date [Table Text Block]	'
	The following table presents information about purchased credit impaired investments acquired during the periods, as of the acquisition dates (dollars in thousands):
		Six months ended June 30,
		2014				2013
	Contractually required payments (including interest)	$	55,671			$	109,931
	Cash flows expected to be collected(1)	44,799				88,422
	Fair value of investments acquired	31,544				58,471
	-1	Represents undiscounted principal and interest cash flow expectations at the date of acquisition.
Schedule Of Certain Loans Acquired In Transfer Accounted For As Available For Sale Debt Securities Accretable Yield [Table Text Block]	'
	The following table presents activity for the accretable yield on purchased credit impaired securities for the three and six months ended June 30, 2014 and 2013 (dollars in thousands):
		Three months ended June 30,								Six months ended June 30,
		2014				2013				2014				2013
	Balance, beginning of period	$	73,367			$	59,915			$	69,469			$	39,239
	Investments purchased	5,684				7,885				13,255				29,951
	Accretion	(2,357		)		(1,879		)		(4,496		)		(3,822		)
	Disposals	—				(832		)		(379		)		(832		)
	Reclassification from nonaccretable difference	(13,477		)		1,180				(14,632		)		1,733
	Balance, end of period	$	63,217			$	66,269			$	63,217			$	66,269
Investments In Debt And Equity Securities Gross Unrealized Losses Disclosures	'
	The following table presents the total gross unrealized losses for the 939 and 1,396 fixed maturity and equity securities as of June 30, 2014 and December 31, 2013, respectively, where the estimated fair value had declined and remained below amortized cost by the indicated amount (dollars in thousands):
			30-Jun-14							31-Dec-13
			Gross				% of Total			Gross				% of Total
			Unrealized							Unrealized
			Losses							Losses
	Less than 20%		$	98,885			88.1	%		$	296,731			91.4	%
	20% or more for less than six months		2,479				2.2			6,444				2
	20% or more for six months or greater		10,938				9.7			21,425				6.6
	Total		$	112,302			100	%		$	324,600			100	%
Fair Value And Investments In Debt And Marketable Equity Securities And Certain Trading Assets Disclosures	'
	The following tables present the estimated fair values and gross unrealized losses, including other-than-temporary impairment losses reported in AOCI, for 939 and 1,396 fixed maturity and equity securities that have estimated fair values below amortized cost as of June 30, 2014 and December 31, 2013, respectively (dollars in thousands). These investments are presented by class and grade of security, as well as the length of time the related fair value has remained below amortized cost.
			Less than 12 months								12 months or greater							Total
							Gross								Gross						Gross
	June 30, 2014:		Estimated				Unrealized				Estimated				Unrealized			Estimated			Unrealized
			Fair Value				Losses				Fair Value				Losses			Fair Value			Losses
	Investment grade securities:
	Corporate securities		$	1,624,031			$	21,638			$	1,062,513			$	36,925		$	2,686,544		$	58,563
	Canadian and Canadian provincial governments		20,728				413				74,864				3,532			95,592			3,945
	Residential mortgage-backed securities		74,009				2,365				122,444				7,337			196,453			9,702
	Asset-backed securities		133,606				1,137				130,015				5,083			263,621			6,220
	Commercial mortgage-backed securities		28,099				206				39,222				4,191			67,321			4,397
	U.S. government and agencies		10,819				9				75,730				1,687			86,549			1,696
	State and political subdivisions		13,426				600				45,879				3,981			59,305			4,581
	Other foreign government, supranational and foreign government-sponsored enterprises		367,176				2,339				187,073				7,023			554,249			9,362
	Total investment grade securities		2,271,894				28,707				1,737,740				69,759			4,009,634			98,466
	Non-investment grade securities:
	Corporate securities		165,552				2,181				19,206				1,359			184,758			3,540
	Residential mortgage-backed securities		16,411				137				3,576				129			19,987			266
	Asset-backed securities		11,334				183				10,747				2,652			22,081			2,835
	Commercial mortgage-backed securities		—				—				6,406				4,637			6,406			4,637
	Other foreign government, supranational and foreign government-sponsored enterprises		2,261				1				—				—			2,261			1
	Total non-investment grade securities		195,558				2,502				39,935				8,777			235,493			11,279
	Total fixed maturity securities		$	2,467,452			$	31,209			$	1,777,675			$	78,536		$	4,245,127		$	109,745
	Non-redeemable preferred stock		$	6,705			$	487			$	14,902			$	1,080		$	21,607		$	1,567
	Other equity securities		—				—				32,463				990			32,463			990
	Total equity securities		$	6,705			$	487			$	47,365			$	2,070		$	54,070		$	2,557
			Less than 12 months								12 months or greater							Total
							Gross								Gross						Gross
	December 31, 2013:		Estimated				Unrealized				Estimated				Unrealized			Estimated			Unrealized
			Fair Value				Losses				Fair Value				Losses			Fair Value			Losses
	Investment grade securities:
	Corporate securities		$	3,141,179			$	148,895			$	301,303			$	40,548		$	3,442,482		$	189,443
	Canadian and Canadian provincial governments		188,491				14,419				12,029				2,429			200,520			16,848
	Residential mortgage-backed securities		283,967				15,900				23,068				1,688			307,035			17,588
	Asset-backed securities		255,656				4,916				56,668				4,983			312,324			9,899
	Commercial mortgage-backed securities		219,110				3,725				20,068				5,745			239,178			9,470
	U.S. government and agencies		133,697				4,469				4,406				279			138,103			4,748
	State and political subdivisions		120,193				9,723				15,202				4,616			135,395			14,339
	Other foreign government, supranational and foreign government-sponsored enterprises		665,313				21,075				36,212				2,847			701,525			23,922
	Total investment grade securities		5,007,606				223,122				468,956				63,135			5,476,562			286,257
	Non-investment grade securities:
	Corporate securities		283,603				9,451				38,256				3,892			321,859			13,343
	Residential mortgage-backed securities		62,146				1,075				3,945				254			66,091			1,329
	Asset-backed securities		28,670				415				32,392				5,498			61,062			5,913
	Commercial mortgage-backed securities		15,762				81				10,980				7,936			26,742			8,017
	Other foreign government, supranational and foreign government-sponsored enterprises		9,403				40				—				—			9,403			40
	Total non-investment grade securities		399,584				11,062				85,573				17,580			485,157			28,642
	Total fixed maturity securities		$	5,407,190			$	234,184			$	554,529			$	80,715		$	5,961,719		$	314,899
	Non-redeemable preferred stock		$	51,386			$	5,479			$	1			$	2		$	51,387		$	5,481
	Other equity securities		218,834				1,748				32,550				2,472			251,384			4,220
	Total equity securities		$	270,220			$	7,227			$	32,551			$	2,474		$	302,771		$	9,701
Investment Income	'
	Major categories of investment income, net of related expenses, consist of the following (dollars in thousands):
			Three months ended June 30,								Six months ended June 30,
			2014				2013				2014				2013
	Fixed maturity securities available-for-sale		$	253,456			$	240,590			$	497,418			$	479,834
	Mortgage loans on real estate		30,373				28,362				63,465				56,605
	Policy loans		13,751				15,450				27,189				33,360
	Funds withheld at interest		108,059				159,212				220,798				296,471
	Short-term investments		80				422				1,045				1,235
	Other invested assets		19,021				13,379				33,522				27,301
	Investment income		424,740				457,415				843,437				894,806
	Investment expense		(14,133		)		(13,181		)		(28,455		)		(25,441		)
	Investment income, net of related expenses		$	410,607			$	444,234			$	814,982			$	869,365
Gain Loss On Investments	'
	Investment related gains (losses), net consist of the following (dollars in thousands):
		Three months ended June 30,								Six months ended June 30,
		2014				2013				2014				2013
	Fixed maturities and equity securities available for sale:
	Other-than-temporary impairment losses on fixed maturities	$	(870	)		$	(9,803	)		$	(1,173	)		$	(10,005	)
	Portion of loss recognized in accumulated other comprehensive income (before taxes)	—				(306		)		—				(306		)
	Net other-than-temporary impairment losses on fixed maturity securities recognized in earnings	(870		)		(10,109		)		(1,173		)		(10,311		)
	Impairment losses on equity securities	—				—				—				—
	Gain on investment activity	34,887				26,845				42,954				48,525
	Loss on investment activity	(6,877		)		(6,760		)		(13,460		)		(17,972		)
	Other impairment losses and change in mortgage loan provision	(5,309		)		125				(3,645		)		(1,501		)
	Derivatives and other, net	96,696				38,142				178,422				123,873
	Total investment related gains (losses), net	$	118,527			$	48,243			$	203,098			$	142,614
Disclosure Of Real Estate Holdings By Property Type [Table Text Block]	'
	The distribution of mortgage loans, gross of valuation allowances, by property type is as follows as of June 30, 2014 and December 31, 2013 (dollars in thousands):
			30-Jun-14							31-Dec-13
			Recorded				% of Total			Recorded				% of Total
			Investment							Investment
	Apartment		$	358,152			14	%		$	289,394			11.6	%
	Retail		740,374				28.9			748,731				30
	Office building		910,375				35.5			917,284				36.7
	Industrial		437,605				17			439,890				17.6
	Other commercial		118,986				4.6			101,487				4.1
	Total		$	2,565,492			100	%		$	2,496,786			100	%
Disclosure Of Real Estate Holdings By Geographical Region [Table Text Block]	'
	As of June 30, 2014 and December 31, 2013, the Company’s mortgage loans, gross of valuation allowances, were distributed throughout the United States as follows (dollars in thousands):
			30-Jun-14							31-Dec-13
			Recorded				% of Total			Recorded				% of Total
			Investment							Investment
	Pacific		$	700,541			27.3	%		$	671,822			26.9	%
	South Atlantic		504,450				19.7			543,658				21.8
	Mountain		420,661				16.4			334,446				13.4
	Middle Atlantic		245,746				9.6			266,802				10.7
	West North Central		171,018				6.7			138,442				5.5
	East North Central		232,235				9			236,766				9.5
	West South Central		159,300				6.2			168,246				6.7
	East South Central		58,986				2.3			59,625				2.4
	New England		72,555				2.8			76,979				3.1
	Total		$	2,565,492			100	%		$	2,496,786			100	%
Mortgage Loans Classified By Contractual Maturity Date [Table Text Block]	'
	The maturities of the mortgage loans, gross of valuation allowances, as of June 30, 2014 and December 31, 2013 are as follows (dollars in thousands):
			30-Jun-14							31-Dec-13
			Recorded				% of Total			Recorded				% of Total
			Investment							Investment
	Due within five years		$	899,909			35.1	%		$	987,109			39.5	%
	Due after five years through ten years		1,088,987				42.4			984,289				39.4
	Due after ten years		576,596				22.5			525,388				21.1
	Total		$	2,565,492			100	%		$	2,496,786			100	%
Mortgage Loan Internal Credit Risk Grade [Table Text Block]	'
	Information regarding the Company’s credit quality indicators, as determined by the Company's internal evaluation methodology for its recorded investment in mortgage loans, gross of valuation allowances, as of June 30, 2014 and December 31, 2013 is as follows (dollars in thousands):
			30-Jun-14							31-Dec-13
	Internal credit quality grade:		Recorded				% of Total			Recorded				% of Total
			Investment							Investment
	High investment grade		$	1,349,486			52.6	%		$	1,437,244			57.5	%
	Investment grade		1,026,129				40			827,993				33.2
	Average		134,736				5.3			155,914				6.2
	Watch list		26,597				1			49,404				2
	In or near default		28,544				1.1			26,231				1.1
	Total		$	2,565,492			100	%		$	2,496,786			100	%
Schedule Of Analysis Of Past Due Financing Receivables	'
	The age analysis of the Company’s past due recorded investment in mortgage loans, gross of valuation allowances, as of June 30, 2014 and December 31, 2013 is as follows (dollars in thousands):
			30-Jun-14				31-Dec-13
			$	—			$	—
	31-60 days past due
			—				—
	61-90 days past due
			7,087				—
	Greater than 90 days
			7,087				—
	Total past due
			2,558,405				2,496,786
	Current
			$	2,565,492			$	2,496,786
	Total
Recorded Investment And Allowance For Credit Losses	'
	The following table presents the recorded investment in mortgage loans, by method of measuring impairment, and the related valuation allowances as of June 30, 2014 and December 31, 2013 (dollars in thousands):
			30-Jun-14				31-Dec-13
	Mortgage loans:
	Individually measured for impairment		$	28,544			$	37,841
	Collectively measured for impairment		2,536,948				2,458,945
	Mortgage loans, gross of valuation allowances		2,565,492				2,496,786
	Valuation allowances:
	Individually measured for impairment		3,714				3,211
	Collectively measured for impairment		5,978				6,895
	Total valuation allowances		9,692				10,106
			$	2,555,800			$	2,486,680
	Mortgage loans, net of valuation allowances
Allowance For Mortgage Loan And Lease Losses Provision For Loss Net	'
	Information regarding the Company’s loan valuation allowances for mortgage loans for the three months ended June 30, 2014 and 2013 is as follows (dollars in thousands):
			Three months ended June 30,
			2014				2013
	Balance, beginning of period		$	8,466			$	9,924
	Charge-offs		—				(1,296		)
	Provision (release)		1,226				(725		)
	Balance, end of period		$	9,692			$	7,903
			Six months ended June 30,
			2014				2013
	Balance, beginning of period		$	10,106			$	11,580
	Recoveries		24				—
	Charge-offs		—				(2,148		)
	Provision (release)		(438		)		(1,529		)
	Balance, end of period		$	9,692			$	7,903
Impaired Financing Receivables Table	'
	Information regarding the portion of the Company’s mortgage loans that were impaired as of June 30, 2014 and December 31, 2013 is as follows (dollars in thousands):
			Unpaid				Recorded				Related				Carrying
			Principal				Investment				Allowance				Value
			Balance
	June 30, 2014:
	Impaired mortgage loans with no valuation allowance recorded		$	9,773			$	9,170			$	—			$	9,170
	Impaired mortgage loans with valuation allowance recorded		19,346				19,374				3,714				15,660
	Total impaired mortgage loans		$	29,119			$	28,544			$	3,714			$	24,830
	December 31, 2013:
	Impaired mortgage loans with no valuation allowance recorded		$	21,698			$	21,100			$	—			$	21,100
	Impaired mortgage loans with valuation allowance recorded		16,772				16,741				3,211				13,530
	Total impaired mortgage loans		$	38,470			$	37,841			$	3,211			$	34,630
	The Company’s average investment in impaired mortgage loans and the related interest income are reflected in the table below for the periods indicated (dollars in thousands):
			Three months ended June 30,
			2014								2013
			Average				Interest				Average				Interest
			Recorded				Income				Recorded				Income
			Investment(1)								Investment(1)
	Impaired mortgage loans with no valuation allowance recorded		$	14,589			$	71			$	15,181			$	49
			15,855				259				24,211				294
	Impaired mortgage loans with valuation allowance recorded
	Total		$	30,444			$	330			$	39,392			$	343
			Six months ended June 30,
			2014								2013
			Average				Interest				Average				Interest
			Recorded				Income				Recorded				Income
			Investment(1)								Investment(1)
	Impaired mortgage loans with no valuation allowance recorded		$	16,759			$	389			$	14,286			$	184
			16,151				452				25,294				534
	Impaired mortgage loans with valuation allowance recorded
	Total		$	32,910			$	841			$	39,580			$	718
	(1) Average recorded investment represents the average loan balances as of the beginning of period and all subsequent quarterly end of period balances
Schedule Of Other Invested Assets [Table Text Block]	'
	Carrying values of these assets as of June 30, 2014 and December 31, 2013 are as follows (dollars in thousands):
			30-Jun-14				31-Dec-13
	Equity securities		$	140,744			$	405,731
	Limited partnerships and real estate joint ventures		425,100				411,456
	Structured loans		193,462				223,549
	Derivatives		135,771				75,227
	FVO contractholder-directed unit-linked investments		151,726				138,892
	Other		81,572				70,105
	Total other invested assets		$	1,128,375			$	1,324,960

Derivative_Instruments_Tables

Derivative Instruments (Tables)	6 Months Ended
	Jun. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Schedule Of Derivative Instruments In Statement Of Financial Position Fair Value	'
	The following table presents the notional amounts and gross fair value of derivative instruments prior to taking into account the netting effects of master netting agreements as of June 30, 2014 and December 31, 2013 (dollars in thousands):
			30-Jun-14											31-Dec-13
			Notional				Carrying Value/Fair Value							Notional				Carrying Value/Fair Value
			Amount				Assets				Liabilities			Amount				Assets				Liabilities
	Derivatives not designated as hedging instruments:
	Interest rate swaps		$	1,314,868			$	62,348			$	7,413		$	1,592,943			$	32,555			$	21,873
	Interest rate options		240,000				5,840				—			240,000				2,554				—
	Financial futures		231,297				—				—			123,780				—				—
	Foreign currency forwards		94,003				313				7,992			79,618				—				12,772
	Consumer price index swaps		63,390				69				—			59,922				—				309
	Credit default swaps		723,700				12,390				1,624			682,700				10,438				2,156
	Equity options		598,564				39,948				—			757,352				33,902				—
	Synthetic guaranteed investment contracts		5,192,798				—				—			4,629,859				—				—
	Embedded derivatives in:
	Modified coinsurance or funds withheld arrangements		—				—				20,194			—				—				176,270
	Indexed annuity products		—				—				881,337			—				—				838,670
	Variable annuity products		—				—				58,899			—				—				30,055
	Total non-hedging derivatives		8,458,620				120,908				977,459			8,166,174				79,449				1,082,105
	Derivatives designated as hedging instruments:
	Interest rate swaps		109,918				1,537				1,108			49,131				—				4,606
	Foreign currency swaps		682,206				23,059				—			728,674				21,903				620
	Total hedging derivatives		792,124				24,596				1,108			777,805				21,903				5,226
	Total derivatives		$	9,250,744			$	145,504			$	978,567		$	8,943,979			$	101,352			$	1,087,331
Offsetting Assets And Liabilities	'
	The following table provides information relating to the Company’s derivative instruments as of June 30, 2014 and December 31, 2013 (dollars in thousands):
														Gross Amounts Not
														Offset in the Balance Sheet
			Gross Amounts				Gross Amounts				Net Amounts			Financial				Cash Collateral				Net Amount
			Recognized				Offset in the				Presented in the			Instruments				Pledged/
							Balance Sheet				Balance Sheet							Received
	June 30, 2014:
	Derivative assets		$	145,504			$	(9,733	)		$	135,771		$	(19,532	)		$	(103,981	)		$	12,258
	Derivative liabilities		18,137				(9,733		)		8,404			(23,004		)		—				(14,600		)
	December 31, 2013:
	Derivative assets		$	101,352			$	(26,125	)		$	75,227		$	(11,095	)		$	(51,006	)		$	13,126
	Derivative liabilities		42,336				(26,125		)		16,211			(18,081		)		(8,033		)		(9,903		)
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]	'
	The following table presents the components of AOCI, before income tax, and the condensed consolidated income statement classification where the gain or loss is recognized related to cash flow hedges for the three and six months ended June 30, 2014 and 2013 (dollars in thousands):
			Three months ended June 30,
			2014				2013
	Accumulated other comprehensive income (loss), balance beginning of period		$	(4,020	)		$	1,961
	Gains (losses) deferred in other comprehensive income (loss) on the effective portion of cash flow hedges		4,798				(6,797		)
	Amounts reclassified to investment income		(321		)		(201		)
	Accumulated other comprehensive income (loss), balance end of period		$	457			$	(5,037	)
			Six months ended June 30,
			2014				2013
	Accumulated other comprehensive income (loss), balance beginning of period		$	(4,578	)		$	403
	Gains (losses) deferred in other comprehensive income (loss) on the effective portion of cash flow hedges		5,574				(4,934		)
	Amounts reclassified to investment income		(539		)		(506		)
	Accumulated other comprehensive income (loss), balance end of period		$	457			$	(5,037	)
Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]	'
	The following table presents the effects of derivatives in cash flow hedging relationships on the condensed consolidated statements of income and AOCI for the three and six months ended June 30, 2014 and 2013 (dollars in thousands):
	Derivatives in Cash Flow		Amount of Gains				Amount and Location of Gains (Losses)							Amount and Location of Gains (Losses)
	Hedging Relationships		(Losses) Deferred in				Reclassified from AOCI into Income (Loss)							Recognized in Income (Loss) on Derivatives
			AOCI on Derivatives
			(Effective Portion)				(Effective Portion)							(Ineffective Portion and Amounts Excluded
														from Effectiveness Testing)
							Investment Related				Investment Income			Investment Related				Investment Income
							Gains (Losses)							Gains (Losses)
	For the three months ended June 30, 2014:
	Interest rate swaps		$	4,798			$	—			$	321		$	7			$	—
	For the three months ended June 30, 2013:
	Interest rate swaps		$	(6,797	)		$	—			$	201		$	31			$	—
	For the six months ended June 30, 2014:
	Interest rate swaps		$	5,574			$	—			$	539		$	1			$	—
	For the six months ended June 30, 2013:
	Interest rate swaps		$	(4,934	)		$	—			$	506		$	14			$	—
Derivatives Hedging Instruments In Net Investment Hedging Relationships	'
	The following table illustrates the Company’s net investments in foreign operations (“NIFO”) hedges for the three and six months ended June 30, 2014 and 2013 (dollars in thousands):
		Derivative Gains (Losses) Deferred in AOCI
		For the three months ended June 30,								For the six months ended June 30,
	Type of NIFO Hedge (1) (2)	2014				2013				2014			2013
	Foreign currency swaps	$	(22,335	)		$	23,913			$	744		$	34,835
	-1	There were no sales or substantial liquidations of net investments in foreign operations that would have required the reclassification of gains or losses from accumulated other comprehensive income (loss) into investment income during the periods presented.
	-2	There was no ineffectiveness recognized for the Company’s hedges of net investments in foreign operations.
Derivative Instruments Gain Loss By Income Statement Location	'
	A summary of the effect of non-hedging derivatives, including embedded derivatives, on the Company’s income statement for the three and six months ended June 30, 2014 and 2013 is as follows (dollars in thousands):
					Gain (Loss) for the three months ended
					June 30,
	Type of Non-hedging Derivative		Income Statement Location of Gain (Loss)		2014				2013
	Interest rate swaps		Investment related gains (losses), net		$	22,251			$	(38,415	)
	Interest rate options		Investment related gains (losses), net		2,004				(7,981		)
	Financial futures		Investment related gains (losses), net		(7,684		)		714
	Foreign currency forwards		Investment related gains (losses), net		1,178				(2,958		)
	CPI swaps		Investment related gains (losses), net		114				(1,117		)
	Credit default swaps		Investment related gains (losses), net		4,783				2,427
	Equity options		Investment related gains (losses), net		(8,800		)		(5,049		)
	Embedded derivatives in:
	Modified coinsurance or funds withheld arrangements		Investment related gains (losses), net		78,835				47,717
	Indexed annuity products		Interest credited		(27,285		)		(28,019		)
	Variable annuity products		Investment related gains (losses), net		(5,183		)		35,809
	Total non-hedging derivatives				$	60,213			$	3,128
					Gain (Loss) for the six months ended
					June 30,
	Type of Non-hedging Derivative		Income Statement Location of Gain (Loss)		2014				2013
	Interest rate swaps		Investment related gains (losses), net		$	51,904			$	(60,679	)
	Interest rate options		Investment related gains (losses), net		3,286				(5,998		)
	Financial futures		Investment related gains (losses), net		(9,268		)		(6,167		)
	Foreign currency forwards		Investment related gains (losses), net		2,332				(8,617		)
	CPI swaps		Investment related gains (losses), net		467				(1,988		)
	Credit default swaps		Investment related gains (losses), net		2,669				6,332
	Equity options		Investment related gains (losses), net		(17,765		)		(35,672		)
	Embedded derivatives in:
	Modified coinsurance or funds withheld arrangements		Investment related gains (losses), net		156,076				137,974
	Indexed annuity products		Interest credited		(51,125		)		(61,015		)
	Variable annuity products		Investment related gains (losses), net		(28,844		)		87,123
	Total non-hedging derivatives				$	109,732			$	51,293
Disclosure Of Credit Derivatives	'
	The following table presents the estimated fair value, maximum amount of future payments and weighted average years to maturity of credit default swaps sold by the Company at June 30, 2014 and December 31, 2013 (dollars in thousands):
			30-Jun-14										31-Dec-13
	Rating Agency Designation of Referenced Credit Obligations(1)		Estimated Fair				Maximum				Weighted		Estimated Fair				Maximum				Weighted
			Value of Credit				Amount of Future				Average		Value of Credit				Amount of Future				Average
			Default Swaps				Payments under				Years to		Default Swaps				Payments under				Years to
							Credit Default				Maturity(3)						Credit Default				Maturity(3)
							Swaps(2)										Swaps(2)
	AAA/AA-/A+/A/A-
	Single name credit default swaps		$	1,995			$	132,500			4.9		$	614			$	117,500			5.1
	Credit default swaps referencing indices		—				—				—		—				—				—
	Subtotal		1,995				132,500				4.9		614				117,500				5.1
	BBB+/BBB/BBB-
	Single name credit default swaps		1,218				195,200				5.4		656				142,200				4.9
	Credit default swaps referencing indices		7,717				391,000				5		7,295				405,000				5
	Subtotal		8,935				586,200				5.1		7,951				547,200				5
	BB+
	Single name credit default swaps		(163		)		5,000				5		—				—				—
	Credit default swaps referencing indices		—				—				—		—				—				—
	Subtotal		(163		)		5,000				5		—				—				—
	Total		$	10,767			$	723,700			5.1		$	8,565			$	664,700			4.4
	-1	The rating agency designations are based on ratings from Standard and Poor’s (“S&P”).
	-2	Assumes the value of the referenced credit obligations is zero.
	-3	The weighted average years to maturity of the credit default swaps is calculated based on weighted average notional amounts.
Changes In Estimated Fair Value Related To Embedded Derivatives	'
	The related gains (losses) and the effect on net income after amortization of deferred acquisition costs (“DAC”) and income taxes for the three and six months ended June 30, 2014 and 2013 are reflected in the following table (dollars in thousands):
		Three months ended June 30,								Six months ended June 30,
		2014				2013				2014			2013
	Embedded derivatives in modco or funds withheld arrangements included in investment related gains	$	78,835			$	47,717			$	156,076		$	137,974
	After the associated amortization of DAC and taxes, the related amounts included in net income	17,962				13,911				36,042			35,535
	Embedded derivatives in variable annuity contracts included in investment related gains	(5,183		)		35,809				(28,844		)	87,123
	After the associated amortization of DAC and taxes, the related amounts included in net income	(6,486		)		29,082				(20,154		)	41,274
	Amounts related to embedded derivatives in equity-indexed annuities included in benefits and expenses	(27,285		)		(28,019		)		(51,125		)	(61,015		)
	After the associated amortization of DAC and taxes, the related amounts included in net income	(15,600		)		(30,845		)		(33,976		)	(60,395		)
Credit Risk	'
	Information regarding the Company’s credit exposure related to its over-the-counter derivative contracts, centrally cleared derivative contracts and margin account for exchange-traded futures at June 30, 2014 and December 31, 2013 are reflected in the following table (dollars in thousands):
			30-Jun-14				31-Dec-13
	Estimated fair value of derivatives in net asset position		$	127,367			$	59,016
	Cash provided as collateral(1)		—				8,033
	Securities pledged to counterparties as collateral(2)		23,004				18,081
	Cash pledged from counterparties as collateral(3)		(103,981		)		(51,006		)
	Securities pledged from counterparties as collateral(4)		(19,532		)		(11,095		)
	Initial margin for cleared derivatives		(13,854		)		(13,350		)
	Net credit exposure		$	13,004			$	9,679
	Margin account related to exchange-traded futures(5)		$	6,524			$	2,566
	-1	Consists of receivable from counterparty, included in other assets.
	-2	Included in other invested assets, primarily consists of U.S. Treasury securities.
	-3	Included in cash and cash equivalents, with obligation to return cash collateral recorded in other liabilities.
	-4	Consists of U.S. Treasury securities.
	-5	Included in cash and cash equivalents.

Fair_Value_of_Assets_and_Liabi1

Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Tables)	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Schedule Of Fair Value Assets and Liabilities Measured on Recurring Basis Table Text Block	'
	Assets and liabilities measured at fair value on a recurring basis as of June 30, 2014 and December 31, 2013 are summarized below (dollars in thousands):
	June 30, 2014:						Fair Value Measurements Using:
			Total				Level 1				Level 2			Level 3
	Assets:
	Fixed maturity securities – available-for-sale:
	Corporate securities		$	14,151,411			$	107,831			$	12,755,640		$	1,287,940
	Canadian and Canadian provincial governments		3,747,638				—				3,747,638			—
	Residential mortgage-backed securities		986,139				—				800,592			185,547
	Asset-backed securities		1,008,375				—				452,215			556,160
	Commercial mortgage-backed securities		1,474,620				—				1,376,706			97,914
	U.S. government and agencies securities		448,506				350,852				64,660			32,994
	State and political subdivision securities		407,487				—				361,720			45,767
	Other foreign government supranational and foreign government-sponsored enterprises		2,256,220				306,505				1,938,827			10,888
	Total fixed maturity securities – available-for-sale		24,480,396				765,188				21,497,998			2,217,210
	Funds withheld at interest – embedded derivatives		(20,194		)		—				—			(20,194		)
	Cash equivalents		516,798				516,798				—			—
	Short-term investments		21,702				10,085				11,617			—
	Other invested assets:
	Non-redeemable preferred stock		86,838				86,838				—			—
	Other equity securities		53,906				53,906				—			—
	Derivatives:
	Interest rate swaps		56,229				—				56,229			—
	Interest rate options		5,840				—				5,840			—
	CPI swaps		69				—				69			—
	Credit default swaps		10,626				—				10,626			—
	Equity options		39,948				—				39,948			—
	Foreign currency swaps		23,059				—				23,059			—
	FVO contractholder-directed unit-linked investments		151,726				145,252				6,474			—
	Other		17,407				17,407				—			—
	Total other invested assets		445,648				303,403				142,245			—
	Total		$	25,444,350			$	1,595,474			$	21,651,860		$	2,197,016
	Liabilities:
	Interest sensitive contract liabilities – embedded derivatives		$	940,236			$	—			$	—		$	940,236
	Other liabilities:
	Derivatives:
	Interest rate swaps		865				—				865			—
	Foreign currency forwards		7,679				—				7,679			—
	Credit default swaps		(140		)		—				(140		)	—
	Total		$	948,640			$	—			$	8,404		$	940,236
	December 31, 2013:						Fair Value Measurements Using:
			Total				Level 1				Level 2			Level 3
	Assets:
	Fixed maturity securities – available-for-sale:
	Corporate securities		$	12,110,755			$	68,934			$	10,696,532		$	1,345,289
	Canadian and Canadian provincial governments		3,381,025				—				3,381,025			—
	Residential mortgage-backed securities		989,643				—				836,138			153,505
	Asset-backed securities		894,832				—				422,984			471,848
	Commercial mortgage-backed securities		1,388,946				—				1,287,161			101,785
	U.S. government and agencies securities		501,351				396,092				64,340			40,919
	State and political subdivision securities		320,820				—				277,044			43,776
	Other foreign government, supranational and foreign government-sponsored enterprises		1,886,764				304,487				1,544,280			37,997
	Total fixed maturity securities – available-for-sale		21,474,136				769,513				18,509,504			2,195,119
	Funds withheld at interest – embedded derivatives		(176,270		)		—				—			(176,270		)
	Cash equivalents		371,345				371,345				—			—
	Short-term investments		111,572				105,649				5,923			—
	Other invested assets:
	Non-redeemable preferred stock		81,854				74,220				2,672			4,962
	Other equity securities		323,877				323,877				—			—
	Derivatives:
	Interest rate swaps		9,904				—				9,904			—
	Interest rate options		2,554				—				2,554			—
	CPI swaps		(309		)		—				(309		)	—
	Credit default swaps		7,926				—				7,926			—
Equity options		33,869				—				33,869			—
Foreign currency swaps		21,283				—				21,283			—
FVO contractholder-directed unit-linked investments		138,892				132,643				6,249			—
Other		9,142				9,142				—			—
Total other invested assets		628,992				539,882				84,148			4,962
Total		$	22,409,775			$	1,786,389			$	18,599,575		$	2,023,811
Liabilities:
Interest sensitive contract liabilities – embedded derivatives		$	868,725			$	—			$	—		$	868,725
Other liabilities:
Derivatives:
Interest rate swaps		3,828				—				3,828			—
Foreign currency forwards		12,772				—				12,772			—
Credit default swaps		(356		)		—				(356		)	—
Equity options		(33		)		—				(33		)	—
Total		$	884,936			$	—			$	16,211		$	868,725
Fair Value Unobservable Input Measurements [Table Text Block]	'
	The following table presents quantitative information about significant unobservable inputs used in Level 3 fair value measurements that are developed by the Company, which does not include unobservable Level 3 asset and liability measurements provided by third parties, as of June 30, 2014 and December 31, 2013 (dollars in thousands):
	June 30, 2014:						Valuation Technique(s)		Unobservable Input		Range (Weighted Average)
			Fair Value
	Assets:
	State and political subdivision securities		$	16,951			Market comparable securities		Liquidity premium		1	%
	Corporate securities		256,581				Market comparable securities		Liquidity premium		0-2% (1%)
	U.S. government and agencies		32,994				Market comparable securities		Liquidity premium		0-1% (1%)
	Funds withheld at interest- embedded derivatives		(20,194		)		Total return swap		Mortality		0-100%  (2%)
									Lapse		0-35%  (7%)
									Withdrawal		0-5%  (3%)
									Own Credit		0-1%  (1%)
									Crediting rate		2-4%  (3%)
	Liabilities:
	Interest sensitive contract liabilities- embedded derivatives- indexed annuities		881,337				Discounted cash flow		Mortality		0-100%  (2%)
									Lapse		0-35%  (7%)
									Withdrawal		0-5%  (3%)
									Option budget projection		2-4%  (3%)
	Interest sensitive contract liabilities- embedded derivatives- variable annuities		58,899				Discounted cash flow		Mortality		0-100% (2%)
									Lapse		0-25% (8%)
									Withdrawal		0-7% (3%)
									Own Credit		0-1% (1%)
									Long-term volatility		0-27% (15%)
		December 31, 2013:		Fair Value				Valuation Technique(s)		Unobservable Input		Range (Weighted Average)
		Assets:
		State and political subdivision securities		$	29,024			Market comparable securities		Liquidity premium		1	%
		Corporate securities		312,887				Market comparable securities		Liquidity premium		0-2%  (1%)
		U.S. government and agencies		37,539				Market comparable securities		Liquidity premium		0-1%  (1%)
		Funds withheld at interest- embedded derivatives		(176,270		)		Total return swap		Mortality		0-100%  (2%)
										Lapse		0-35%  (7%)
										Withdrawal		0-5%  (3%)
										Own Credit		0-1%  (1%)
										Crediting Rate		2-4%  (3%)
		Liabilities:
		Interest sensitive contract liabilities- embedded derivatives- indexed annuities		838,670				Discounted cash flow		Mortality		0-100% (2%)
										Lapse		0-35% (7%)
										Withdrawal		0-5% (3%)
										Option budget projection		2-4% (3%)
		Interest sensitive contract liabilities- embedded derivatives- variable annuities		30,055				Discounted cash flow		Mortality		0-100% (2%)
										Lapse		0-25% (6%)
										Withdrawal		0-7% (3%)
										Own Credit		0-1% (1%)
										Long-term volatility		0-27% (10%)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Level Transfers [Table Text Block]	'
	The following tables present the transfers between Level 1 and Level 2 during the three and six months ended June 30, 2014 and 2013 (dollars in thousands):
			Three months ended June 30,
			2014								2013
			Transfers from				Transfers from				Transfers from			Transfers from
			Level 1 to				Level 2 to				Level 1 to			Level 2 to
			Level 2				Level 1				Level 2			Level 1
	Fixed maturity securities - available-for-sale:
	Corporate securities		$	—			$	10,058			$	—		$	—
	Total fixed maturity securities		$	—			$	10,058			$	—		$	—
			Six months ended June 30,
			2014								2013
			Transfers from				Transfers from				Transfers from			Transfers from
			Level 1 to				Level 2 to				Level 1 to			Level 2 to
			Level 2				Level 1				Level 2			Level 1
	Fixed maturity securities - available-for-sale:
	Corporate securities		$	—			$	10,058			$	—		$	14,012
	Total fixed maturity securities		$	—			$	10,058			$	—		$	14,012
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]	'
	The tables below provide a summary of the changes in fair value of Level 3 assets and liabilities for the three and six months ended June 30, 2014, as well as the portion of gains or losses included in income for the three and six months ended June 30, 2014 attributable to unrealized gains or losses related to those assets and liabilities still held at June 30, 2014 (dollars in thousands):
	For the three months ended June 30, 2014:		Fixed maturity securities - available-for-sale
			Corporate				Residential				Asset-backed			Commercial			U.S. Government
			securities				mortgage-				securities			mortgage-			and agencies
							backed							backed			securities
							securities							securities
	Fair value, beginning of period		$	1,291,701			$	177,927			$	502,675		$	90,373		$	38,031
	Total gains/losses (realized/unrealized)
	Included in earnings, net:
	Investment income, net of related expenses		(1,273		)		42				2,055			447			(185		)
	Investment related gains (losses), net		165				31				942			6			(55		)
	Claims & other policy benefits		—				—				—			—			—
	Interest credited		—				—				—			—			—
	Policy acquisition costs and other insurance expenses		—				—				—			—			—
	Included in other comprehensive income		6,086				368				514			1,639			572
	Purchases(1)		52,549				13,398				64,884			—			165
	Sales(1)		(8,929		)		—				(14,258		)	—			—
	Settlements(1)		(49,002		)		(6,401		)		(6,318		)	(263		)	(5,534		)
	Transfers into Level 3		—				901				5,666			5,712			—
	Transfers out of Level 3		(3,357		)		(719		)		—			—			—
	Fair value, end of period		$	1,287,940			$	185,547			$	556,160		$	97,914		$	32,994
	Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
	Included in earnings, net:
	Investment income, net of related expenses		$	(1,274	)		$	42			$	2,005		$	447		$	(185	)
	Investment related gains (losses), net		—				—				—			—			—
	Claims & other policy benefits		—				—				—			—			—
	Interest credited		—				—				—			—			—
	Policy acquisition costs and other insurance expenses		—				—				—			—			—
	For the three months ended June 30, 2014 (continued):		Fixed maturity securities
			available-for-sale
			State				Other foreign government, supranational and foreign government-sponsored enterprises				Funds withheld			Interest sensitive contract liabilities embedded derivatives
			and political								at interest-
			subdivision								embedded
			securities								derivative
	Fair value, beginning of period		$	43,833			$	11,157			$	(99,029	)	$	(911,987	)
	Total gains/losses (realized/unrealized)
	Included in earnings, net:
	Investment income, net of related expenses		10				—				—			—
	Investment related gains (losses), net		(4		)		—				78,835			(5,182		)
	Claims & other policy benefits		—				—				—			—
	Interest credited		—				—				—			(27,285		)
	Policy acquisition costs and other insurance expenses		—				—				—			—
	Included in other comprehensive income		2,330				33				—			—
	Purchases(1)		—				—				—			(14,215		)
	Sales(1)		—				—				—			—
	Settlements(1)		(402		)		(302		)		—			18,433
	Transfers into Level 3		—				—				—			—
	Transfers out of Level 3		—				—				—			—
	Fair value, end of period		$	45,767			$	10,888			$	(20,194	)	$	(940,236	)
	Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
	Included in earnings, net:
	Investment income, net of related expenses		$	10			$	—			$	—		$	—
	Investment related gains (losses), net		—				—				78,835			(5,946		)
	Claims & other policy benefits		—				—				—			—
	Interest credited		—				—				—			(45,718		)
	Policy acquisition costs and other insurance expenses		—				—				—			—
	For the six months ended June 30, 2014:		Fixed maturity securities - available-for-sale
			Corporate				Residential				Asset-backed			Commercial			U.S. Government
			securities				mortgage-				securities			mortgage-			and agencies
							backed							backed			securities
							securities							securities
	Fair value, beginning of period		$	1,345,289			$	153,505			$	471,848		$	101,785		$	40,919
	Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses		(2,385		)		98				4,112			819			(282		)
Investment related gains (losses), net		5				137				1,247			92			(250		)
Claims & other policy benefits		—				—				—			—			—
Interest credited		—				—				—			—			—
Policy acquisition costs and other insurance expenses		—				—				—			—			—
Included in other comprehensive income		8,536				3,255				6,014			4,674			877
Purchases(1)		132,061				32,148				124,108			—			293
Sales(1)		(47,676		)		(744		)		(20,870		)	(14,626		)	—
Settlements(1)		(100,946		)		(12,573		)		(12,633		)	(542		)	(8,563		)
Transfers into Level 3		6,930				11,464				11,614			5,712			—
Transfers out of Level 3		(53,874		)		(1,743		)		(29,280		)	—			—
Fair value, end of period		$	1,287,940			$	185,547			$	556,160		$	97,914		$	32,994
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses		$	(2,336	)		$	94			$	2,005		$	875		$	(282	)
Investment related gains (losses), net		—				—				—			—			—
Claims & other policy benefits		—				—				—			—			—
Interest credited		—				—				—			—			—
Policy acquisition costs and other insurance expenses		—				—				—			—			—
For the six months ended June 30, 2014 (continued):		Fixed maturity securities
		available-for-sale
		State				Other foreign government, supranational and foreign government-sponsored enterprises				Funds withheld			Other invested assets- non-redeemable preferred stock			Interest sensitive contract liabilities embedded derivatives
		and political								at interest-
		subdivision								embedded
		securities								derivative
Fair value, beginning of period		$	43,776			$	37,997			$	(176,270	)	$	4,962		$	(868,725	)
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses		21				—				—			—			—
Investment related gains (losses), net		(8		)		—				156,076			—			(28,844		)
Claims & other policy benefits		—				—				—			—			—
Interest credited		—				—				—			—			(51,125		)
Policy acquisition costs and other insurance expenses		—				—				—			—			—
Included in other comprehensive income		2,443				33				—			—			—
Purchases(1)		—				—				—			—			(29,408		)
Sales(1)		—				—				—			—			—
Settlements(1)		(465		)		(599		)		—			—			37,866
Transfers into Level 3		—				—				—			—			—
Transfers out of Level 3		—				(26,543		)		—			(4,962		)	—
Fair value, end of period		$	45,767			$	10,888			$	(20,194	)	$	—		$	(940,236	)
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses		$	21			$	—			$	—		$	—		$	—
Investment related gains (losses), net		—				—				156,076			—			(30,156		)
Claims & other policy benefits		—				—				—			—			—
Interest credited		—				—				—			—			(88,991		)
Policy acquisition costs and other insurance expenses		—				—				—			—			—
-1	The amount reported within purchases, sales and settlements is the purchase price (for purchases) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased or sold/settled. Items purchased and sold/settled in the same period are excluded from the rollforward. The Company had no issuances during the period.
The tables below provide a summary of the changes in fair value of Level 3 assets and liabilities for the three and six months ended June 30, 2013, as well as the portion of gains or losses included in income for the three and six months ended June 30, 2013 attributable to unrealized gains or losses related to those assets and liabilities still held at June 30, 2013 (dollars in thousands):
For the three months ended June 30, 2013:		Fixed maturity securities - available-for-sale
		Corporate				Residential mortgage-backed securities				Asset-backed securities			Commercial mortgage-backed securities			State and political subdivision securities
		securities
Fair value, beginning of period		$	1,646,903			$	140,717			$	288,231		$	175,294		$	42,639
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses		(2,313		)		(111		)		1,526			581			9
Investment related gains (losses), net		350				198				226			(8,992		)	(4		)
Claims & other policy benefits		—				—				—			—			—
Interest credited		—				—				—			—			—
Policy acquisition costs and other insurance expenses		—				—				—			—			—
Included in other comprehensive income		(37,672		)		(2,714		)		2,601			15,445			(1,087		)
Purchases (1)		100,690				11,383				72,542			—			—
Sales(1)		(39,793		)		(1,018		)		(7,995		)	(1,118		)	—
Settlements(1)		(80,533		)		(7,367		)		(5,559		)	(228		)	(282		)
Transfers into Level 3		4,373				4,306				5,340			—			—
Transfers out of Level 3		—				(5,340		)		(4,306		)	—			—
Fair value, end of period		$	1,592,005			$	140,054			$	352,606		$	180,982		$	41,275
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses		$	(2,191	)		$	(112	)		$	1,515		$	580		$	9
Investment related gains (losses), net		—				—				—			(10,109		)	—
Claims & other policy benefits		—				—				—			—			—
Interest credited		—				—				—			—			—
Policy acquisition costs and other insurance expenses		—				—				—			—			—
		Fixed maturity securities - available-for-sale
For the three months ended June 30, 2013 (continued):		Other foreign government, supranational and foreign government-sponsored enterprises				Funds withheld				Short-term			Interest sensitive contract liabilities embedded derivatives
						at interest-				investments
						embedded
						derivatives
Fair value, beginning of period		$	27,865			$	(156,189	)		$	22,001		$	(890,476	)
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses		(76		)		—				—			—
Investment related gains (losses), net		—				47,716				—			35,809
Claims & other policy benefits		—				—				—			—
Interest credited		—				—				—			(28,020		)
Policy acquisition costs and other insurance expenses		—				—				—			—
Included in other comprehensive income		(959		)		—				(1		)	—
Purchases(1)		—				—				—			(14,764		)
Sales(1)		—				—				—			—
Settlements(1)		—				—				(22,000		)	18,883
Transfers into Level 3		—				—				—			—
Transfers out of Level 3		—				—				—			—
Fair value, end of period		$	26,830			$	(108,473	)		$	—		$	(878,568	)
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses		$	(76	)		$	—			$	—		$	—
Investment related gains (losses), net		—				47,717				—			34,788
Claims & other policy benefits		—				—				—			—
Interest credited		—				—				—			(46,902		)
Policy acquisition costs and other insurance expenses		—				—				—			—
For the six months ended June 30, 2013:		Fixed maturity securities - available-for-sale
		Corporate				Residential mortgage-backed securities				Asset-backed securities			Commercial mortgage-backed securities			U.S. Government and agencies securities			State and political subdivision securities
		securities
Fair value, beginning of period		$	1,668,563			$	93,931			$	232,391		$	167,006		$	4,538		$	43,212
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses		(4,339		)		(6		)		2,405			1,083			—			18
Investment related gains (losses), net		(913		)		25				(1,521		)	(9,862		)	—			(8		)
Claims & other policy benefits		—				—				—			—			—			—
Interest credited		—				—				—			—			—			—
Policy acquisition costs and other insurance expenses		—				—				—			—			—			—
Included in other comprehensive income		(36,710		)		(200		)		14,638			27,945			—			(1,639		)
Purchases (1)		175,362				51,920				128,423			—			—			—
Sales(1)		(56,071		)		(2,617		)		(16,293		)	(2,722		)	—			—
Settlements(1)		(145,899		)		(12,289		)		(11,436		)	(2,468		)	—			(308		)
Transfers into Level 3		8,146				14,630				8,305			—			—			—
Transfers out of Level 3		(16,134		)		(5,340		)		(4,306		)	—			(4,538		)	—
Fair value, end of period		$	1,592,005			$	140,054			$	352,606		$	180,982		$	—		$	41,275
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses		$	(4,218	)		$	(7	)		$	2,397		$	1,081		$	—		$	18
Investment related gains (losses), net		(202		)		—				—			(10,109		)	—			—
Claims & other policy benefits		—				—				—			—			—			—
Interest credited		—				—				—			—			—			—
Policy acquisition costs and other insurance expenses		—				—				—			—			—			—
		Fixed maturity securities - available-for-sale
For the six months ended June 30, 2013 (continued):		Other foreign government, supranational and foreign government-sponsored enterprises				Funds withheld				Short-term			Interest sensitive contract liabilities embedded derivatives
						at interest-				investments
						embedded
						derivatives
Fair value, beginning of period		$	28,280			$	(243,177	)		$	22,031		$	(912,361	)
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses		(150		)		—				(3		)	—
Investment related gains (losses), net		—				134,704				—			87,123
Claims & other policy benefits		—				—				—			—
Interest credited		—				—				—			(61,016		)
Policy acquisition costs and other insurance expenses		—				—				—			—
Included in other comprehensive income		(1,300		)		—				(28		)	—
Purchases(1)		—				—				—			(28,624		)
Sales(1)		—				—				—			—
Settlements(1)		—				—				(22,000		)	36,310
Transfers into Level 3		—				—				—			—
Transfers out of Level 3		—				—				—			—
Fair value, end of period		$	26,830			$	(108,473	)		$	—		$	(878,568	)
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses		$	(150	)		$	—			$	(4	)	$	—
Investment related gains (losses), net		—				134,705				—			84,911
Claims & other policy benefits		—				—				—			—
Interest credited		—				—				—			(97,326		)
Policy acquisition costs and other insurance expenses		—				—				—			—
-1	The amount reported within purchases, sales and settlements is the purchase price (for purchases) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased or sold/settled. Items purchased and sold/settled in the same period are excluded from the rollforward. The Company had no issuances during the period.
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Table Text Block]	'
	The following table presents information for assets measured at estimated fair value on a nonrecurring basis during the periods presented; that is, they are not measured at fair value on a recurring basis but are subject to fair value adjustments only in certain circumstances (for example, when there is evidence of impairment). The estimated fair values for these assets were determined using significant unobservable inputs (Level 3).
			Carrying Value After Measurement								Net Investment Gains (Losses)
			At June 30,								Three months ended June 30,						Six months ended June 30,
	(dollars in thousands)		2014				2013				2014			2013			2014			2013
	Mortgage loans(1)		$	15,660			$	13,575			$	(2,037	)	$	(27	)	$	(1,656	)	$	93
	Limited partnership interests(2)		8,889				9,161				(4,171		)	—			(4,171		)	(2,429		)
	Real estate investments(3)		—				4,136				—			(600		)	—			(600		)
	-1	Mortgage loans — The impaired mortgage loans presented above were written down to their estimated fair values at the date the impairments were recognized and are reported as losses above. Subsequent improvements in estimated fair value on previously impaired loans recorded through a reduction in the previously established valuation allowance are reported as gains above. Nonrecurring fair value adjustments on mortgage loans are based on the fair value of underlying collateral or discounted cash flows.
	-2	Limited partnership interests — The impaired limited partnership interests presented above were accounted for using the cost method. Impairments on these cost method investments were recognized at estimated fair value determined using the net asset values of the Company’s ownership interest as provided in the financial statements of the investees. The market for these investments has limited activity and price transparency.
	-3	Real estate investments — The impaired real estate investments presented above were written down to their estimated fair value at the date of impairment and are reported as losses above. The impairments were based on third-party appraisal values obtained and reviewed by the Company.
Financial Instruments Carrying Amounts And Estimated Fair Value [Table Text Block]	'
	The following table presents the carrying amounts and estimated fair values of the Company’s financial instruments, which were not measured at fair value on a recurring basis, at June 30, 2014 and December 31, 2013 (dollars in thousands):
	June 30, 2014:		Carrying Value				Estimated				Fair Value Measurement Using:
							Fair Value				Level 1			Level 2			Level 3
	Assets:
	Mortgage loans on real estate		$	2,555,800			$	2,654,439			$	—		$	—		$	2,654,439
	Policy loans		1,250,635				1,250,635				—			1,250,635			—
	Funds withheld at interest(1)		5,958,657				6,377,951				—			—			6,377,951
	Cash and cash equivalents(2)		861,319				861,319				861,319			—			—
	Short-term investments(2)		23,894				23,894				23,894			—			—
	Other invested assets(2)		460,905				509,067				5,216			38,446			465,405
	Accrued investment income		279,368				279,368				—			279,368			—
	Liabilities:
	Interest-sensitive contract liabilities(1)		$	9,890,923			$	9,818,666			$	—		$	—		$	9,818,666
	Short-term debt		110,000				110,000				—			110,000			—
	Long-term debt		2,214,705				2,438,495				—			—			2,438,495
	Collateral finance facility		482,092				377,403				—			—			377,403
	December 31, 2013:		Carrying Value				Estimated				Fair Value Measurement Using:
							Fair Value				Level 1			Level 2			Level 3
	Assets:
	Mortgage loans on real estate		$	2,486,680			$	2,489,721			$	—		$	—		$	2,489,721
	Policy loans		1,244,469				1,244,469				—			1,244,469			—
	Funds withheld at interest(1)		5,948,374				6,207,342				—			—			6,207,342
	Cash and cash equivalents(2)		552,302				552,302				552,302			—			—
	Short-term investments(2)		27,823				27,823				27,823			—			—
	Other invested assets(2)		491,545				534,442				5,070			33,886			495,486
	Accrued investment income		267,908				267,908				—			267,908			—
	Liabilities:
	Interest-sensitive contract liabilities(1)		$	10,228,120			$	9,989,514			$	—		$	—		$	9,989,514
	Long-term debt		2,214,350				2,333,023				—			—			2,333,023
	Collateral finance facility		484,752				374,984				—			—			374,984
	-1	Carrying values presented herein differ from those presented in the condensed consolidated balance sheets because certain items within the respective financial statement caption are embedded derivatives and are measured at fair value on a recurring basis.
	-2	Carrying values presented herein differ from those presented in the condensed consolidated balance sheets because certain items within the respective financial statement caption are measured at fair value on a recurring basis.

Segment_Information_Tables

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
Reconciliation Of Revenue From Segments To Consolidated Text Block	'
	The Company’s reportable segments are strategic business units that are primarily segregated by geographic region. Information related to revenues, income (loss) before income taxes and total assets of the Company for each reportable segment are summarized below (dollars in thousands).
		Three months ended June 30,						Six months ended June 30,
	Total revenues:	2014			2013			2014			2013
	U.S. and Latin America:
	Traditional	$	1,333,027		$	1,275,331		$	2,611,719		$	2,472,255
	Non-Traditional	293,448			301,991			582,069			616,091
	Canada	309,113			295,325			586,862			592,414
	Europe, Middle East and Africa	391,318			310,169			757,175			617,756
	Asia Pacific	483,171			383,978			898,200			793,829
	Corporate and Other	22,943			23,848			54,168			99,399
	Total	$	2,833,020		$	2,590,642		$	5,490,193		$	5,191,744
Reconciliation Of Operating Profit Loss From Segments To Consolidated Text Block	'
		Three months ended June 30,						Six months ended June 30,
	Income (loss) before income taxes:	2014			2013			2014			2013
	U.S. and Latin America:
	Traditional	$	93,988		$	90,213		$	144,960		$	169,756
	Non-Traditional	95,474			80,996			178,598			178,560
	Canada	35,020			35,659			55,084			71,967
	Europe, Middle East and Africa	61,322			11,949			76,527			22,912
	Asia Pacific	34,928			(287,345		)	61,239			(269,103		)
	Corporate and Other	(20,197		)	(6,230		)	(16,433		)	29,977
	Total	$	300,535		$	(74,758	)	$	499,975		$	204,069
Reconciliation Of Assets From Segment To Consolidated Text Block	'
	Total Assets:	30-Jun-13			31-Dec-13
	U.S. and Latin America:
	Traditional	$	13,659,119		$	13,285,423
	Non-Traditional	11,706,053			11,716,908
	Canada	4,074,727			4,103,730
	Europe, Middle East and Africa	4,407,325			2,230,568
	Asia Pacific	3,817,197			3,597,456
	Corporate and Other	5,506,630			4,740,388
	Total	$	43,171,051		$	39,674,473

Commitments_and_Contingent_Lia1

Commitments and Contingent Liabilities (Tables)	6 Months Ended
	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block]	'
	The Company's commitments to fund investments as of June 30, 2014 and December 31, 2013 are presented in the following table (dollars in millions):
		June 30, 2014				December 31, 2013
	Limited partnerships	$	291.1			$	239.5
	Commercial mortgage loans	61.6				4.6
	Private placements	14				22
	Bank loans and revolving credit agreements	57.8				37
Credit Facilities	'
	The following table provides additional information on the Company’s credit facilities as of June 30, 2014 and December 31, 2013 (dollars in millions):
							Amount Utilized(1)
	Facility Capacity				Maturity Date		30-Jun-14		31-Dec-13		Basis of Fees
	$	850			December 2015		$	230.6	$	67.6	Senior unsecured long-term debt rating
	200				September 2019		200		200		Fixed
	120				May-16		80		85.1		Fixed
	270				Nov-17		270		270		Fixed
	100				Jun-17		89		89.4		Fixed
	88.2(2)				Nov-14		88.2		58.4		Fixed
	105.1(2)				Mar-19		105.1		132.5		Fixed
	150				Jun-16		—		—		Fixed
	47.2(2)				May-16		—		—		Fixed
	-1	Represents issued but undrawn letters of credit. There was no cash borrowed for the periods presented.
	-2	Foreign currency facility, U.S. dollar amount may vary.
Schedule of Guarantor Obligations [Table Text Block]	'
	RGA’s guarantees issued as of June 30, 2014 and December 31, 2013 are reflected in the following table (dollars in millions):
		June 30, 2014				December 31, 2013
	Treaty guarantees	$	966.9			$	826.9
	Treaty guarantees, net of assets in trust	776.7				647.9
	Borrowed securities	187.7				93
	Financing arrangements	—				—
	Lease obligations	7.6				8.3
Other Commitments [Table Text Block]	'
	The following table presents information about these commitments (dollars in millions):
			Maximum Potential Obligation
	Commitment Period		30-Jun-14				31-Dec-13
	2026		$	500			$	500
	2033		1,850.00				1,350.00
	2034		2,000.00				—
	2036		1,250.00				1,250.00

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables)	6 Months Ended
	Jun. 30, 2014
Compensation and Retirement Disclosure [Abstract]	'
Schedule Of Defined Benefit Plans Disclosures Text Block	'
	The components of net periodic benefit costs for the three and six months ended June 30, 2014 and 2013 were as follows (dollars in thousands):
		Pension Benefits						Other Benefits
		Three months ended June 30,						Three months ended June 30,
		2014			2013			2014		2013
	Service cost	$	2,489		$	2,129		$	470	$	410
	Interest Cost	1,487			1,020			339		311
	Expected return on plan assets	(1,302		)	(1,100		)	—		—
	Amortization of prior service cost	216			213			—		—
	Amortization of prior actuarial loss	245			782			217		186
	Net periodic benefit cost	$	3,135		$	3,044		$	1,026	$	907
		Pension Benefits						Other Benefits
		Six months ended June 30,						Six months ended June 30,
		2014			2013			2014		2013
	Service cost	$	3,990		$	4,012		$	940	$	820
	Interest Cost	2,295			2,038			677		623
	Expected return on plan assets	(2,235		)	(1,867		)	—		—
	Amortization of prior service cost	218			307			—		—
	Amortization of prior actuarial loss	918			1,619			434		372
	Net periodic benefit cost	$	5,186		$	6,109		$	2,051	$	1,815

Earnings_Per_Share_Reconciliat

Earnings Per Share (Reconciliation of the Numerators and Denominators of the Basic and Diluted Per Shares) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings:	'	'	'	'
Net income (numerator for basic and diluted calculations)	$198,296	($49,612)	$334,960	$135,923
Shares:	'	'	'	'
Weighted average outstanding shares (denominator for basic calculation)	69,076	72,350	69,823	73,089
Equivalent shares from outstanding stock options	642	0	666	484
Denominator for diluted calculation	69,718	72,350	70,489	73,573
Earnings Per Share:	'	'	'	'
Basic earnings per share	$2.87	($0.69)	$4.80	$1.86
Diluted earnings per share	$2.84	($0.69)	$4.75	$1.85

Earnings_Per_Share_Narrative_D

Earnings Per Share (Narrative) (Details)	3 Months Ended				6 Months Ended
	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
		Stock Options [Member]	Stock Options [Member]	Contingently Issuable Shares [Member]	Contingently Issuable Shares [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]	'	'	'	'	'
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount	400,000	300,000	0	800,000	700,000
Weighted Average Number Diluted Shares Outstanding Assuming Exercise Of Share Based Payment Arrangements	72,800,000	'	'	'	'

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income (Balance of and Changes in Each Component of AOCI) (Details) (USD $)	3 Months Ended				6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]	'		'		'		'
Balance, Beginning of Period	'		'		$1,005,607		$2,108,902
Other comprehensive income (loss) before reclassifications	'		'		646,731		-921,750
Amounts reclassified from AOCI	'		'		-23,678		-5,018
Net current-period other comprehensive income (loss)	349,161		-794,606		623,053		-926,768
Balance, End of Period	1,628,660		1,182,134		1,628,660		1,182,134
Accumulated Currency Translation Adjustments [Member]	'		'		'		'
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]	'		'		'		'
Balance, Beginning of Period	'		'		207,083		267,475
Other comprehensive income (loss) before reclassifications	'		'		-40		-102,937
Amounts reclassified from AOCI	'		'		0		0
Net current-period other comprehensive income (loss)	'		'		-40		-102,937
Balance, End of Period	207,043		164,538		207,043		164,538
Unrealized Appreciation Of Securities [Member]	'		'		'		'
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]	'		'		'		'
Balance, Beginning of Period	'		'		820,245	[1]	1,877,657	[1]
Other comprehensive income (loss) before reclassifications	'		'		646,777	[1]	-819,019	[1]
Amounts reclassified from AOCI	'		'		-24,698	[1]	-6,512	[1]
Net current-period other comprehensive income (loss)	'		'		622,079	[1]	-825,531	[1]
Balance, End of Period	1,442,324	[1]	1,052,126	[1]	1,442,324	[1]	1,052,126	[1]
Pension And Postretirement Benefits [Member]	'		'		'		'
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]	'		'		'		'
Balance, Beginning of Period	'		'		-21,721		-36,230
Other comprehensive income (loss) before reclassifications	'		'		-6		206
Amounts reclassified from AOCI	'		'		1,020		1,494
Net current-period other comprehensive income (loss)	'		'		1,014		1,700
Balance, End of Period	($20,707)		($34,530)		($20,707)		($34,530)
[1]	Includes cash flow hedges. See Note 5 - “Derivative Instruments” for additional information on cash flow hedges.

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive Income (Schedule of Reclassifications out of AOCI) (Details) (USD $)	3 Months Ended				6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]	'		'		'		'
Investment related gains (losses), net	$119,397		$58,352		$204,271		$152,925
Investment income	410,607		444,234		814,982		869,365
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	300,535		-74,758		499,975		204,069
Tax (expense) benefit	-102,239		25,146		-165,015		-68,146
Net income (loss)	198,296		-49,612		334,960		135,923
Unrealized Appreciation Depreciation Of Investments [Member]	'		'		'		'
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]	'		'		'		'
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	31,833		428		37,661		9,533
Tax (expense) benefit	-11,059		-87		-12,963		-3,021
Net income (loss)	20,774		341		24,698		6,512
Unrealized Appreciation Depreciation Of Investments [Member] | Unrealized Gains Losses On Available For Sale Securities [Member]	'		'		'		'
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]	'		'		'		'
Investment related gains (losses), net	27,142		13,510		28,331		23,858
Unrealized Appreciation Depreciation Of Investments [Member] | Gains Losses On Qualifying Cash Flow Hedging Instruments [Member]	'		'		'		'
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]	'		'		'		'
Investment income	321		201		539		506
Unrealized Appreciation Depreciation Of Investments [Member] | DAC Attributed To Unrealized Gains Losses [Member]	'		'		'		'
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]	'		'		'		'
Deferred policy acquisition costs attributed to unrealized gains and losses	4,370	[1]	-13,283	[1]	8,791	[1]	-14,831	[1]
Amortization Of Unrealized Pension And Postretirement Benefits [Member]	'		'		'		'
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]	'		'		'		'
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	-678		-1,181		-1,570		-2,298
Tax (expense) benefit	238		413		550		804
Net income (loss)	-440		-768		-1,020		-1,494
Amounts Reclassified From AOCI [Member]	'		'		'		'
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]	'		'		'		'
Net income (loss)	20,334		-427		23,678		5,018
Prior Service Cost [Member] | Amortization Of Unrealized Pension And Postretirement Benefits [Member]	'		'		'		'
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]	'		'		'		'
Prior service cost	-216	[2]	-213	[2]	-218	[2]	-307	[2]
Actuarial Gains Losses [Member] | Amortization Of Unrealized Pension And Postretirement Benefits [Member]	'		'		'		'
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]	'		'		'		'
Actuarial gains/(losses)	($462)	[2]	($968)	[2]	($1,352)	[2]	($1,991)	[2]
[1]	This AOCI component is included in the computation of the deferred policy acquisition cost. See Note 8 – “Deferred Policy Acquisition Costs” of the 2013 Annual Report for additional details.
[2]	These AOCI components are included in the computation of the net periodic pension cost. See Note 9 – “Employee Benefit Plans” for additional details.

Investments_Investments_in_Fix

Investments (Investments in Fixed Maturity and Equity Securities Available-for-Sale by Sector) (Details) (USD $)	6 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	$13,280,721	$11,697,394
Unrealized Losses	112,302	324,600
Estimated Fair Value	14,151,411	12,110,755
% of Total	100.00%	100.00%
Fixed maturity securities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	22,373,346	20,270,734
Unrealized Gains	2,216,795	1,518,301
Unrealized Losses	109,745	314,899
Estimated Fair Value	24,480,396	21,474,136
% of Total	100.00%	100.00%
Other-than-temporary impairments in AOCI	-1,555	-4,168
Equity securities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	135,073	409,472
Unrealized Gains	8,228	5,960
Unrealized Losses	2,557	9,701
Estimated Fair Value	140,744	405,731
% of Total	100.00%	100.00%
Corporate securities | Fixed maturity securities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	13,280,721	11,697,394
Unrealized Gains	932,793	616,147
Unrealized Losses	62,103	202,786
Estimated Fair Value	14,151,411	12,110,755
% of Total	57.80%	56.40%
Other-than-temporary impairments in AOCI	0	0
Canadian and Canadian provincial governments | Fixed maturity securities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	2,786,873	2,728,111
Unrealized Gains	964,710	669,762
Unrealized Losses	3,945	16,848
Estimated Fair Value	3,747,638	3,381,025
% of Total	15.30%	15.70%
Other-than-temporary impairments in AOCI	0	0
Residential mortgage-backed securities | Fixed maturity securities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	946,431	970,434
Unrealized Gains	49,676	38,126
Unrealized Losses	9,968	18,917
Estimated Fair Value	986,139	989,643
% of Total	4.10%	4.60%
Other-than-temporary impairments in AOCI	-300	-300
Asset-backed securities | Fixed maturity securities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	993,116	891,751
Unrealized Gains	24,314	18,893
Unrealized Losses	9,055	15,812
Estimated Fair Value	1,008,375	894,832
% of Total	4.10%	4.20%
Other-than-temporary impairments in AOCI	354	-2,259
Commercial Mortgage Backed Securities [Member] | Fixed maturity securities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	1,380,622	1,314,782
Unrealized Gains	103,032	91,651
Unrealized Losses	9,034	17,487
Estimated Fair Value	1,474,620	1,388,946
% of Total	6.00%	6.50%
Other-than-temporary impairments in AOCI	-1,609	-1,609
US government and agencies | Fixed maturity securities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	429,215	489,631
Unrealized Gains	20,987	16,468
Unrealized Losses	1,696	4,748
Estimated Fair Value	448,506	501,351
% of Total	1.80%	2.30%
Other-than-temporary impairments in AOCI	0	0
State and political subdivisions | Fixed maturity securities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	369,515	313,252
Unrealized Gains	42,553	21,907
Unrealized Losses	4,581	14,339
Estimated Fair Value	407,487	320,820
% of Total	1.70%	1.50%
Other-than-temporary impairments in AOCI	0	0
Other foreign government, supranational and foreign government-sponsored enterprises | Fixed maturity securities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	2,186,853	1,865,379
Unrealized Gains	78,730	45,347
Unrealized Losses	9,363	23,962
Estimated Fair Value	2,256,220	1,886,764
% of Total	9.20%	8.80%
Other-than-temporary impairments in AOCI	0	0
Nonredeemable Preferred Stock [Member] | Equity securities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	81,240	81,993
Unrealized Gains	7,165	5,342
Unrealized Losses	1,567	5,481
Estimated Fair Value	86,838	81,854
% of Total	61.70%	20.20%
Other equity securities | Equity securities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	53,833	327,479
Unrealized Gains	1,063	618
Unrealized Losses	990	4,220
Estimated Fair Value	$53,906	$323,877
% of Total	38.30%	79.80%

Investments_Amortized_Cost_and

Investments (Amortized Cost and Fair Value of Fixed Maturities by Contractual Maturities) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Available For Sale Securities Debt Maturities Amortized Cost	'	'
Due in one year or less	$637,052	'
Due after one year through five years	4,116,731	'
Due after five year through ten years	7,415,405	'
Due after ten years	6,883,989	'
Asset and mortgage-backed securities	3,320,169	'
Total	22,373,346	20,270,734
Available For Sale Securities Debt Maturities Fair Value	'	'
Due in one year or less	644,928	'
Due after one year through five years	4,358,370	'
Due after five year through ten years	7,871,893	'
Due after ten years	8,136,071	'
Asset and mortgage-backed securities	3,469,134	'
Total	$24,480,396	$21,474,136

Investments_Amortized_Cost_and1

Investments (Amortized Cost and Fair Value of Fixed Maturitiy Holdings by Industry Type) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Corporate Securities by Investment Sector And Credit Rating [Line Items]	'	'
Amortized Cost	$13,280,721	$11,697,394
Estimated Fair Value	14,151,411	12,110,755
% of Total	100.00%	100.00%
Finance	'	'
Corporate Securities by Investment Sector And Credit Rating [Line Items]	'	'
Amortized Cost	4,512,831	3,838,716
Estimated Fair Value	4,788,259	3,983,623
% of Total	33.80%	32.90%
Industrial	'	'
Corporate Securities by Investment Sector And Credit Rating [Line Items]	'	'
Amortized Cost	7,240,086	6,607,100
Estimated Fair Value	7,729,309	6,824,063
% of Total	54.60%	56.30%
Utility	'	'
Corporate Securities by Investment Sector And Credit Rating [Line Items]	'	'
Amortized Cost	1,516,641	1,240,353
Estimated Fair Value	1,622,357	1,292,305
% of Total	11.50%	10.70%
Other	'	'
Corporate Securities by Investment Sector And Credit Rating [Line Items]	'	'
Amortized Cost	11,163	11,225
Estimated Fair Value	$11,486	$10,764
% of Total	0.10%	0.10%

Investments_Credit_Losses_Reco

Investments (Credit Losses Recognized in Earnings on Fixed Maturity Securities Held by the Company) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Other Than Temporary Impairment Credit Losses Recognized In Earnings Roll Forward	'	'	'	'
Balance, beginning of period	$11,696	$14,773	$11,696	$16,675
Other Than Temporary Impairments Credit Losses On Securities Impaired To Fair Value	0	1,449	0	1,449
Credit loss impairments previously recognized on securities which were sold during the period	-4,412	0	-4,412	-1,902
Balance, end of period	$7,284	$13,324	$7,284	$13,324

Investments_Purchased_Credit_I

Investments (Purchased Credit Impaired Securities Included in Fixed Maturity Securities) (Details) (USD $)	Jun. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Certain Loans Acquired in Transfer Accounted for as Available-for-sale Debt Securities [Abstract]	'		'
Outstanding principal and interest balance	$213,901	[1]	$192,644	[1]
Carrying value, including accrued interest	$175,604	[2]	$148,822	[2]
[1]	Represents the contractually required payments which is the sum of contractual principal, whether or not currently due, and accrued interest.
[2]	Estimated fair value plus accrued interest.

Investments_Purchased_Credit_I1

Investments (Purchased Credit Impaired Investments) (Details) (USD $)	Jun. 30, 2014		Jun. 30, 2013
In Thousands, unless otherwise specified
Certain Loans Acquired in Transfer Accounted for as Available-for-sale Debt Securities, Acquired [Abstract]	'		'
Contractually required payments (including interest)	$55,671		$109,931
Cash flows expected to be collected	44,799	[1]	88,422	[1]
Fair value of investments acquired	$31,544		$58,471
[1]	Represents undiscounted principal and interest cash flow expectations at the date of acquisition.

Investments_Accretable_Yield_o

Investments (Accretable Yield on Purchased Credit Impaired Securities) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Certain Loans Acquired in Transfer Accounted for as Available-for-sale Debt Securities, Accretable Yield Movement Schedule [Roll Forward]	'	'	'	'
Balance, beginning of period	$73,367	$59,915	$69,469	$39,239
Investments purchased	5,684	7,885	13,255	29,951
Accretion	-2,357	-1,879	-4,496	-3,822
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Disposals of Loans	0	-832	-379	-832
Reclassification to nonaccretable difference	-13,477	1,180	-14,632	1,733
Balance, end of period	$63,217	$66,269	$63,217	$66,269

Investments_Fair_Value_Below_A

Investments (Fair Value Below Amortized Cost of Gross Unrealized Losses for Fixed Maturity and Equity Securities) (Details) (USD $)	6 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Gross unrealized losses with number of securities [Line Items]	'	'
Gross Unrealized Losses	$112,302	$324,600
% of Total	100.00%	100.00%
Less than 20%	'	'
Gross unrealized losses with number of securities [Line Items]	'	'
Gross Unrealized Losses	98,885	296,731
% of Total	88.10%	91.40%
20% or more for less than six months	'	'
Gross unrealized losses with number of securities [Line Items]	'	'
Gross Unrealized Losses	2,479	6,444
% of Total	2.20%	2.00%
20% or more for six months or greater	'	'
Gross unrealized losses with number of securities [Line Items]	'	'
Gross Unrealized Losses	$10,938	$21,425
% of Total	9.70%	6.60%

Investments_Fair_Value_and_Los

Investments (Fair Value and Losses by Investment Category and Legth of Time in a Loss Position) (Details) (USD $)	6 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Fixed maturity securities	'	'
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]	'	'
Estimated Fair Value - Less than 12 months	$2,467,452	$5,407,190
Gross Unrealized Losses - Less than 12 months	31,209	234,184
Estimated Fair Value - 12 months or greater	1,777,675	554,529
Gross Unrealized Losses - 12 months or greater	78,536	80,715
Estimated Fair Value	4,245,127	5,961,719
Gross Unrealized Losses	109,745	314,899
Equity securities	'	'
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]	'	'
Estimated Fair Value - Less than 12 months	6,705	270,220
Gross Unrealized Losses - Less than 12 months	487	7,227
Estimated Fair Value - 12 months or greater	47,365	32,551
Gross Unrealized Losses - 12 months or greater	2,070	2,474
Estimated Fair Value	54,070	302,771
Gross Unrealized Losses	2,557	9,701
Non-investment grade securities | Fixed maturity securities	'	'
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]	'	'
Estimated Fair Value - Less than 12 months	195,558	399,584
Gross Unrealized Losses - Less than 12 months	2,502	11,062
Estimated Fair Value - 12 months or greater	39,935	85,573
Gross Unrealized Losses - 12 months or greater	8,777	17,580
Estimated Fair Value	235,493	485,157
Gross Unrealized Losses	11,279	28,642
Investment grade securities | Fixed maturity securities	'	'
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]	'	'
Estimated Fair Value - Less than 12 months	2,271,894	5,007,606
Gross Unrealized Losses - Less than 12 months	28,707	223,122
Estimated Fair Value - 12 months or greater	1,737,740	468,956
Gross Unrealized Losses - 12 months or greater	69,759	63,135
Estimated Fair Value	4,009,634	5,476,562
Gross Unrealized Losses	98,466	286,257
Corporate securities | Non-investment grade securities | Fixed maturity securities	'	'
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]	'	'
Estimated Fair Value - Less than 12 months	165,552	283,603
Gross Unrealized Losses - Less than 12 months	2,181	9,451
Estimated Fair Value - 12 months or greater	19,206	38,256
Gross Unrealized Losses - 12 months or greater	1,359	3,892
Estimated Fair Value	184,758	321,859
Gross Unrealized Losses	3,540	13,343
Corporate securities | Investment grade securities | Fixed maturity securities	'	'
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]	'	'
Estimated Fair Value - Less than 12 months	1,624,031	3,141,179
Gross Unrealized Losses - Less than 12 months	21,638	148,895
Estimated Fair Value - 12 months or greater	1,062,513	301,303
Gross Unrealized Losses - 12 months or greater	36,925	40,548
Estimated Fair Value	2,686,544	3,442,482
Gross Unrealized Losses	58,563	189,443
Canadian and Canadian provincial governments | Investment grade securities | Fixed maturity securities	'	'
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]	'	'
Estimated Fair Value - Less than 12 months	20,728	188,491
Gross Unrealized Losses - Less than 12 months	413	14,419
Estimated Fair Value - 12 months or greater	74,864	12,029
Gross Unrealized Losses - 12 months or greater	3,532	2,429
Estimated Fair Value	95,592	200,520
Gross Unrealized Losses	3,945	16,848
Residential mortgage-backed securities | Non-investment grade securities | Fixed maturity securities	'	'
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]	'	'
Estimated Fair Value - Less than 12 months	16,411	62,146
Gross Unrealized Losses - Less than 12 months	137	1,075
Estimated Fair Value - 12 months or greater	3,576	3,945
Gross Unrealized Losses - 12 months or greater	129	254
Estimated Fair Value	19,987	66,091
Gross Unrealized Losses	266	1,329
Residential mortgage-backed securities | Investment grade securities | Fixed maturity securities	'	'
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]	'	'
Estimated Fair Value - Less than 12 months	74,009	283,967
Gross Unrealized Losses - Less than 12 months	2,365	15,900
Estimated Fair Value - 12 months or greater	122,444	23,068
Gross Unrealized Losses - 12 months or greater	7,337	1,688
Estimated Fair Value	196,453	307,035
Gross Unrealized Losses	9,702	17,588
Asset-backed securities | Non-investment grade securities | Fixed maturity securities	'	'
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]	'	'
Estimated Fair Value - Less than 12 months	11,334	28,670
Gross Unrealized Losses - Less than 12 months	183	415
Estimated Fair Value - 12 months or greater	10,747	32,392
Gross Unrealized Losses - 12 months or greater	2,652	5,498
Estimated Fair Value	22,081	61,062
Gross Unrealized Losses	2,835	5,913
Asset-backed securities | Investment grade securities | Fixed maturity securities	'	'
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]	'	'
Estimated Fair Value - Less than 12 months	133,606	255,656
Gross Unrealized Losses - Less than 12 months	1,137	4,916
Estimated Fair Value - 12 months or greater	130,015	56,668
Gross Unrealized Losses - 12 months or greater	5,083	4,983
Estimated Fair Value	263,621	312,324
Gross Unrealized Losses	6,220	9,899
Commercial mortgage-backed securities | Non-investment grade securities | Fixed maturity securities	'	'
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]	'	'
Estimated Fair Value - Less than 12 months	0	15,762
Gross Unrealized Losses - Less than 12 months	0	81
Estimated Fair Value - 12 months or greater	6,406	10,980
Gross Unrealized Losses - 12 months or greater	4,637	7,936
Estimated Fair Value	6,406	26,742
Gross Unrealized Losses	4,637	8,017
Commercial mortgage-backed securities | Investment grade securities | Fixed maturity securities	'	'
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]	'	'
Estimated Fair Value - Less than 12 months	28,099	219,110
Gross Unrealized Losses - Less than 12 months	206	3,725
Estimated Fair Value - 12 months or greater	39,222	20,068
Gross Unrealized Losses - 12 months or greater	4,191	5,745
Estimated Fair Value	67,321	239,178
Gross Unrealized Losses	4,397	9,470
US Government Agencies Debt Securities [Member] | Investment grade securities | Fixed maturity securities	'	'
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]	'	'
Estimated Fair Value - Less than 12 months	10,819	133,697
Gross Unrealized Losses - Less than 12 months	9	4,469
Estimated Fair Value - 12 months or greater	75,730	4,406
Gross Unrealized Losses - 12 months or greater	1,687	279
Estimated Fair Value	86,549	138,103
Gross Unrealized Losses	1,696	4,748
State and political subdivisions | Investment grade securities | Fixed maturity securities	'	'
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]	'	'
Estimated Fair Value - Less than 12 months	13,426	120,193
Gross Unrealized Losses - Less than 12 months	600	9,723
Estimated Fair Value - 12 months or greater	45,879	15,202
Gross Unrealized Losses - 12 months or greater	3,981	4,616
Estimated Fair Value	59,305	135,395
Gross Unrealized Losses	4,581	14,339
Other foreign government, supranational and foreign government-sponsored enterprises | Non-investment grade securities | Fixed maturity securities	'	'
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]	'	'
Estimated Fair Value - Less than 12 months	2,261	9,403
Gross Unrealized Losses - Less than 12 months	1	40
Estimated Fair Value - 12 months or greater	0	0
Gross Unrealized Losses - 12 months or greater	0	0
Estimated Fair Value	2,261	9,403
Gross Unrealized Losses	1	40
Other foreign government, supranational and foreign government-sponsored enterprises | Investment grade securities | Fixed maturity securities	'	'
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]	'	'
Estimated Fair Value - Less than 12 months	367,176	665,313
Gross Unrealized Losses - Less than 12 months	2,339	21,075
Estimated Fair Value - 12 months or greater	187,073	36,212
Gross Unrealized Losses - 12 months or greater	7,023	2,847
Estimated Fair Value	554,249	701,525
Gross Unrealized Losses	9,362	23,922
Nonredeemable Preferred Stock [Member] | Equity securities	'	'
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]	'	'
Estimated Fair Value - Less than 12 months	6,705	51,386
Gross Unrealized Losses - Less than 12 months	487	5,479
Estimated Fair Value - 12 months or greater	14,902	1
Gross Unrealized Losses - 12 months or greater	1,080	2
Estimated Fair Value	21,607	51,387
Gross Unrealized Losses	1,567	5,481
Other equity securities | Equity securities	'	'
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]	'	'
Estimated Fair Value - Less than 12 months	0	218,834
Gross Unrealized Losses - Less than 12 months	0	1,748
Estimated Fair Value - 12 months or greater	32,463	32,550
Gross Unrealized Losses - 12 months or greater	990	2,472
Estimated Fair Value	32,463	251,384
Gross Unrealized Losses	$990	$4,220

Investments_Investment_Income_

Investments (Investment Income Net of Related Expenses) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Major Categories Of Investment Income Net of Expenses [Line Items]	'	'	'	'
Investment revenue	$424,740	$457,415	$843,437	$894,806
Investment expense	-14,133	-13,181	-28,455	-25,441
Investment income, net of related expenses	410,607	444,234	814,982	869,365
Available-for-sale Securities [Member]	'	'	'	'
Major Categories Of Investment Income Net of Expenses [Line Items]	'	'	'	'
Investment revenue	253,456	240,590	497,418	479,834
Mortgage Loans on Real Estate [Member]	'	'	'	'
Major Categories Of Investment Income Net of Expenses [Line Items]	'	'	'	'
Investment revenue	30,373	28,362	63,465	56,605
Policy loans	'	'	'	'
Major Categories Of Investment Income Net of Expenses [Line Items]	'	'	'	'
Investment revenue	13,751	15,450	27,189	33,360
Funds withheld at interest	'	'	'	'
Major Categories Of Investment Income Net of Expenses [Line Items]	'	'	'	'
Investment revenue	108,059	159,212	220,798	296,471
Short-term Investments [Member]	'	'	'	'
Major Categories Of Investment Income Net of Expenses [Line Items]	'	'	'	'
Investment revenue	80	422	1,045	1,235
Other invested assets	'	'	'	'
Major Categories Of Investment Income Net of Expenses [Line Items]	'	'	'	'
Investment revenue	$19,021	$13,379	$33,522	$27,301

Investments_Investment_Related

Investments (Investment Related Gains (Losses) Net) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Investment Gains And Losses [Abstract]	'	'	'	'
Other-than-temporary impairments on fixed maturity securities	($870)	($9,803)	($1,173)	($10,005)
Portion of loss recognized in accumulated other comprehensive income (before taxes)	0	-306	0	-306
Net other-than-temporary impairment losses on fixed maturities recognized in earnings	-870	-10,109	-1,173	-10,311
Impairment losses on equity securities	0	0	0	0
Gain on investment activity	34,887	26,845	42,954	48,525
Loss on investment activity	-6,877	-6,760	-13,460	-17,972
Other impairment losses and change in mortgage loan provision	-5,309	125	-3,645	-1,501
Derivatives and other, net	96,696	38,142	178,422	123,873
Total investment related gains (losses), net	$118,527	$48,243	$203,098	$142,614

Investments_Mortgage_Loans_by_

Investments (Mortgage Loans by Property Type) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Mortgage Loans Property Type Indicators [Line Items]	'	'
Recorded investment	$2,565,492	$2,496,786
Percentage of total	100.00%	100.00%
Apartment	'	'
Mortgage Loans Property Type Indicators [Line Items]	'	'
Recorded investment	358,152	289,394
Percentage of total	14.00%	11.60%
Retail	'	'
Mortgage Loans Property Type Indicators [Line Items]	'	'
Recorded investment	740,374	748,731
Percentage of total	28.90%	30.00%
Office building	'	'
Mortgage Loans Property Type Indicators [Line Items]	'	'
Recorded investment	910,375	917,284
Percentage of total	35.50%	36.70%
Industrial	'	'
Mortgage Loans Property Type Indicators [Line Items]	'	'
Recorded investment	437,605	439,890
Percentage of total	17.00%	17.60%
Other commercial	'	'
Mortgage Loans Property Type Indicators [Line Items]	'	'
Recorded investment	$118,986	$101,487
Percentage of total	4.60%	4.10%

Investments_Mortgage_Loans_by_1

Investments (Mortgage Loans by Real Estate Geographic Location) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Mortgage Loans On Real Estate Geographic Location Of Property [Line Items]	'	'
Recorded investment	$2,565,492	$2,496,786
Percentage of total	100.00%	100.00%
Pacific	'	'
Mortgage Loans On Real Estate Geographic Location Of Property [Line Items]	'	'
Recorded investment	700,541	671,822
Percentage of total	27.30%	26.90%
South Atlantic	'	'
Mortgage Loans On Real Estate Geographic Location Of Property [Line Items]	'	'
Recorded investment	504,450	543,658
Percentage of total	19.70%	21.80%
Mountain	'	'
Mortgage Loans On Real Estate Geographic Location Of Property [Line Items]	'	'
Recorded investment	420,661	334,446
Percentage of total	16.40%	13.40%
Middle Atlantic	'	'
Mortgage Loans On Real Estate Geographic Location Of Property [Line Items]	'	'
Recorded investment	245,746	266,802
Percentage of total	9.60%	10.70%
West North Central	'	'
Mortgage Loans On Real Estate Geographic Location Of Property [Line Items]	'	'
Recorded investment	171,018	138,442
Percentage of total	6.70%	5.50%
East North Central	'	'
Mortgage Loans On Real Estate Geographic Location Of Property [Line Items]	'	'
Recorded investment	232,235	236,766
Percentage of total	9.00%	9.50%
West South Central	'	'
Mortgage Loans On Real Estate Geographic Location Of Property [Line Items]	'	'
Recorded investment	159,300	168,246
Percentage of total	6.20%	6.70%
East South Central	'	'
Mortgage Loans On Real Estate Geographic Location Of Property [Line Items]	'	'
Recorded investment	58,986	59,625
Percentage of total	2.30%	2.40%
New England	'	'
Mortgage Loans On Real Estate Geographic Location Of Property [Line Items]	'	'
Recorded investment	$72,555	$76,979
Percentage of total	2.80%	3.10%

Investments_Mortgage_Loans_by_2

Investments (Mortgage Loans by Maturity Date) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Mortgage Loans on Real Estate [Line Items]	'	'
Mortgage loans, gross of valuation allowances	$2,565,492	$2,496,786
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	100.00%	100.00%
Due within five years	'	'
Mortgage Loans on Real Estate [Line Items]	'	'
Mortgage loans, gross of valuation allowances	899,909	987,109
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	35.10%	39.50%
Due after five years through ten years	'	'
Mortgage Loans on Real Estate [Line Items]	'	'
Mortgage loans, gross of valuation allowances	1,088,987	984,289
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	42.40%	39.40%
Due after ten years	'	'
Mortgage Loans on Real Estate [Line Items]	'	'
Mortgage loans, gross of valuation allowances	$576,596	$525,388
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	22.50%	21.10%

Investments_Mortgage_Loans_by_3

Investments (Mortgage Loans by Credit Quality Indicator) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Credit Quality Indicators [Line Items]	'	'
Mortgage loans, gross of valuation allowances	$2,565,492	$2,496,786
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	100.00%	100.00%
High investment grade	'	'
Credit Quality Indicators [Line Items]	'	'
Mortgage loans, gross of valuation allowances	1,349,486	1,437,244
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	52.60%	57.50%
Investment grade	'	'
Credit Quality Indicators [Line Items]	'	'
Mortgage loans, gross of valuation allowances	1,026,129	827,993
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	40.00%	33.20%
Average	'	'
Credit Quality Indicators [Line Items]	'	'
Mortgage loans, gross of valuation allowances	134,736	155,914
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	5.30%	6.20%
Watch list	'	'
Credit Quality Indicators [Line Items]	'	'
Mortgage loans, gross of valuation allowances	26,597	49,404
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	1.00%	2.00%
In or near default	'	'
Credit Quality Indicators [Line Items]	'	'
Mortgage loans, gross of valuation allowances	$28,544	$26,231
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	1.10%	1.10%

Investments_Age_Analysis_of_Pa

Investments (Age Analysis of Past Due Recorded Investment In Mortgage Loans) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable Recorded Investment Aging	'	'
Total mortgage loans	$2,565,492	$2,496,786
Investment in mortgage loans	'	'
Financing Receivable Recorded Investment Aging	'	'
31-60 days past due	0	0
61-90 days past due	0	0
Greater than 90 days	7,087	0
Total past due	7,087	0
Current	2,558,405	2,496,786
Total mortgage loans	$2,565,492	$2,496,786

Investments_Mortgage_Loans_by_4

Investments (Mortgage Loans by Method of Evaluation and Related Valuation Allowances) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Mortgage Loans:	'	'
Total mortgage loans	$2,565,492	$2,496,786
Mortgage Loans Net Of Valuation Allowances [Abstract]	'	'
Mortgage loans on real estate (net of valuation allowances)	2,555,800	2,486,680
Commercial Real Estate Portfolio Segment	'	'
Mortgage Loans:	'	'
Evaluated individually for credit losses	28,544	37,841
Evaluated collectively for credit losses	2,536,948	2,458,945
Total mortgage loans	2,565,492	2,496,786
Valuation Allowances:	'	'
Specific for credit losses	3,714	3,211
Non-specifically identified credit losses	5,978	6,895
Total valuation allowances	$9,692	$10,106

Investments_Loan_Valuation_All

Investments (Loan Valuation Allowance for Mortgage Loans) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Investments [Abstract]	'	'	'	'
Proceeds from Recoveries of Loans Previously Charged off	'	'	$24	$0
Allowance For Loan And Lease Losses Roll Forward	'	'	'	'
Balance, Beginning of Period	8,466	9,924	10,106	11,580
Charge-offs	0	-1,296	0	-2,148
Provision (release)	1,226	-725	-438	-1,529
Balance, End of Period	$9,692	$7,903	$9,692	$7,903

Investments_Impaired_Mortgage_

Investments (Impaired Mortgage Loans) (Details) (USD $)	3 Months Ended				6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013		Dec. 31, 2013
Financing Receivable Impaired [Line Items]	'		'		'		'		'
Unpaid Principal Balance	$29,119		'		$29,119		'		$38,470
Recorded Investment	28,544		'		28,544		'		37,841
Related Allowance	3,714		'		3,714		'		3,211
Carrying Value	24,830		'		24,830		'		34,630
Average Investment	30,444	[1]	39,392	[1]	32,910	[1]	39,580	[1]	'
Interest Income	330		343		841		718		'
Impaired mortgage loans with valuation allowance recorded	'		'		'		'		'
Financing Receivable Impaired [Line Items]	'		'		'		'		'
Unpaid Principal Balance	19,346		'		19,346		'		16,772
Recorded Investment	19,374		'		19,374		'		16,741
Related Allowance	3,714		'		3,714		'		3,211
Carrying Value	15,660		'		15,660		'		13,530
Average Investment	15,855	[1]	24,211	[1]	16,151	[1]	25,294	[1]	'
Interest Income	259		294		452		534		'
Impaired mortgage loans with no valuation allowance recorded	'		'		'		'		'
Financing Receivable Impaired [Line Items]	'		'		'		'		'
Unpaid Principal Balance	9,773		'		9,773		'		21,698
Recorded Investment	9,170		'		9,170		'		21,100
Related Allowance	0		'		0		'		0
Carrying Value	9,170		'		9,170		'		21,100
Average Investment	14,589	[1]	15,181	[1]	16,759	[1]	14,286	[1]	'
Interest Income	$71		$49		$389		$184		'
[1]	Average recorded investment represents the average loan balances as of the beginning of period and all subsequent quarterly end of period balances.

Investments_Other_Invested_Ass

Investments (Other Invested Assets) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Other Investments [Line Items]	'	'
Other invested assets	$1,128,375	$1,324,960
Equity securities	'	'
Other Investments [Line Items]	'	'
Other invested assets	140,744	405,731
Limited Partner [Member]	'	'
Other Investments [Line Items]	'	'
Other invested assets	425,100	411,456
Structured loans	'	'
Other Investments [Line Items]	'	'
Other invested assets	193,462	223,549
Derivatives	'	'
Other Investments [Line Items]	'	'
Other invested assets	135,771	75,227
Fair Value Option Contractholder Directed Unit Linked Investments [Member]	'	'
Other Investments [Line Items]	'	'
Other invested assets	151,726	138,892
Other	'	'
Other Investments [Line Items]	'	'
Other invested assets	$81,572	$70,105

Investments_Narrative_Details

Investments (Narrative) (Details) (USD $)

3 Months Ended

6 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2013

Dec. 31, 2012

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

securities

securities

securities

Collateral Fixed Maturity Securities

Collateral Fixed Maturity Securities

Canadian Province Of Ontario Securities

Canadian Province Of Ontario Securities

Canadian Province Of Quebec Securities

Canadian Province Of Quebec Securities

Available For Sale Securities Amortized Cost [Member]

Available For Sale Securities Amortized Cost [Member]

Available For Sale Securities Fair Value Disclosure [Member]

Available For Sale Securities Fair Value Disclosure [Member]

Collateral Received Fixed Maturity Securities [Member]

Collateral Received Fixed Maturity Securities [Member]

Investment in mortgage loans

Investment in mortgage loans

Fixed maturity securities

Fixed maturity securities

Fixed maturity securities

Fixed maturity securities

Fixed maturity securities

Fixed maturity securities

Non-investment grade securities

Non-investment grade securities

Corporate securities

Corporate securities

Non-investment grade securities

Non-investment grade securities

Investment Narrative [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Transfer to Investments

'

'

$1,580,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

109,745,000

314,899,000

11,279,000

28,642,000

3,540,000

13,343,000

Available-for-sale Securities, Amortized Cost Basis

13,280,721,000

'

13,280,721,000

'

11,697,394,000

70,000,000

57,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Securities held in trust

'

'

'

'

'

'

'

'

'

'

'

9,600,700,000

7,842,900,000

10,188,100,000

8,125,400,000

'

'

'

'

'

'

'

'

'

'

Proceeds From Sale Of Available For Sale Securities Sold At Loss

222,800,000

257,600,000

457,900,000

461,900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities

14,151,411,000

'

14,151,411,000

'

12,110,755,000

71,800,000

58,000,000

1,336,500,000

1,222,300,000

1,553,800,000

1,389,100,000

'

'

'

'

111,800,000

94,100,000

'

'

'

'

'

'

'

'

Securities as a percentage of consolidated stockholder equity

10.00%

'

10.00%

'

10.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of fixed maturity and equity securities in an unrealized loss position

939

'

939

'

1,396

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Gross Unrealized Losses - 12 months or greater

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

78,536,000

80,715,000

8,777,000

17,580,000

1,359,000

3,892,000

Net other-than-temporary impairment losses on fixed maturities recognized in earnings

-870,000

-10,109,000

-1,173,000

-10,311,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Realized losses on fixed maturity and equity securities sold

-6,877,000

-6,760,000

-13,460,000

-17,972,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

Minimum percentage of fair value

'

'

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

'

'

'

'

'

'

'

Securities Borrowed

'

'

'

'

'

'

'

'

'

'

'

187,700,000

93,000,000

191,100,000

93,000,000

'

'

'

'

'

'

'

'

'

'

Collateral Obtained Percent Of Fair Value Reverse Repurchase Agreements

'

'

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Securities pledged or received

300,700,000

'

300,700,000

'

300,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Securities Sold under Agreements to Repurchase, Fair Value of Collateral

315,200,000

'

315,200,000

'

310,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities

354,900,000

'

354,900,000

'

344,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Mortgage loans percentage of total investments

7.20%

'

7.20%

'

7.70%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum loan to value ratio on mortgage loan approval

'

'

75.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Mortgage loans on nonaccrual status

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

7,087,000

0

'

'

'

'

'

'

Policy loans, percentage of total investments

3.50%

'

3.50%

'

3.80%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Funds withheld at interest, percentage of total investments

16.80%

'

16.80%

'

17.80%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Funds withheld at interest

5,940,521,000

'

5,940,521,000

'

5,771,467,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Funds withheld at interest, percentage attibutable to one client

$4,200,000,000

'

$4,200,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Other invested assets, percentage of total investments

3.20%

'

3.20%

'

4.10%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivative_Instruments_Gross_N

Derivative Instruments (Gross Notional Amount and Fair Value of Derivatives Contracts) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Derivative [Line Items]	'	'
Notional Amount	$9,250,744	$8,943,979
Carrying Value / Fair Value of Assets	145,504	101,352
Carrying Value / Fair Value of Liabilities	978,567	1,087,331
Not Designated as Hedging Instrument	'	'
Derivative [Line Items]	'	'
Notional Amount	8,458,620	8,166,174
Carrying Value / Fair Value of Assets	120,908	79,449
Carrying Value / Fair Value of Liabilities	977,459	1,082,105
Not Designated as Hedging Instrument | Interest Rate Swaps	'	'
Derivative [Line Items]	'	'
Notional Amount	1,314,868	1,592,943
Carrying Value / Fair Value of Assets	62,348	32,555
Carrying Value / Fair Value of Liabilities	7,413	21,873
Not Designated as Hedging Instrument | Interest Rate Options	'	'
Derivative [Line Items]	'	'
Notional Amount	240,000	240,000
Carrying Value / Fair Value of Assets	5,840	2,554
Carrying Value / Fair Value of Liabilities	0	0
Not Designated as Hedging Instrument | Financial Futures	'	'
Derivative [Line Items]	'	'
Notional Amount	231,297	123,780
Carrying Value / Fair Value of Assets	0	0
Carrying Value / Fair Value of Liabilities	0	0
Not Designated as Hedging Instrument | Foreign Currency Forwards	'	'
Derivative [Line Items]	'	'
Notional Amount	94,003	79,618
Carrying Value / Fair Value of Assets	313	0
Carrying Value / Fair Value of Liabilities	7,992	12,772
Not Designated as Hedging Instrument | Consumer Price Index Swaps	'	'
Derivative [Line Items]	'	'
Notional Amount	63,390	59,922
Carrying Value / Fair Value of Assets	69	0
Carrying Value / Fair Value of Liabilities	0	309
Not Designated as Hedging Instrument | Credit Default Swaps	'	'
Derivative [Line Items]	'	'
Notional Amount	723,700	682,700
Carrying Value / Fair Value of Assets	12,390	10,438
Carrying Value / Fair Value of Liabilities	1,624	2,156
Not Designated as Hedging Instrument | Equity Options	'	'
Derivative [Line Items]	'	'
Notional Amount	598,564	757,352
Carrying Value / Fair Value of Assets	39,948	33,902
Carrying Value / Fair Value of Liabilities	0	0
Not Designated as Hedging Instrument | Embedded Derivatives In Modified Coinsurance Or Funds Withheld Arrangements	'	'
Derivative [Line Items]	'	'
Notional Amount	0	0
Carrying Value / Fair Value of Assets	0	0
Carrying Value / Fair Value of Liabilities	20,194	176,270
Not Designated as Hedging Instrument | Embedded Derivatives In Indexed Annuity Products	'	'
Derivative [Line Items]	'	'
Notional Amount	0	0
Carrying Value / Fair Value of Assets	0	0
Carrying Value / Fair Value of Liabilities	881,337	838,670
Not Designated as Hedging Instrument | Embedded Derivatives In Variable Annuity Products	'	'
Derivative [Line Items]	'	'
Notional Amount	0	0
Carrying Value / Fair Value of Assets	0	0
Carrying Value / Fair Value of Liabilities	58,899	30,055
Not Designated as Hedging Instrument | Synthetic Guaranteed Investment Contracts	'	'
Derivative [Line Items]	'	'
Notional Amount	5,192,798	4,629,859
Carrying Value / Fair Value of Assets	0	0
Carrying Value / Fair Value of Liabilities	0	0
Designated As Hedging Instrument	'	'
Derivative [Line Items]	'	'
Notional Amount	792,124	777,805
Carrying Value / Fair Value of Assets	24,596	21,903
Carrying Value / Fair Value of Liabilities	1,108	5,226
Designated As Hedging Instrument | Interest Rate Swaps	'	'
Derivative [Line Items]	'	'
Notional Amount	109,918	49,131
Carrying Value / Fair Value of Assets	1,537	0
Carrying Value / Fair Value of Liabilities	1,108	4,606
Designated As Hedging Instrument | Currency Swap [Member]	'	'
Derivative [Line Items]	'	'
Notional Amount	682,206	728,674
Carrying Value / Fair Value of Assets	23,059	21,903
Carrying Value / Fair Value of Liabilities	$0	$620

Derivative_Instruments_Derivat

Derivative Instruments (Derivative Instruments Offsetting Balance Sheet) (Details) (USD $)	Jun. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Derivative Assets [Abstract]	'		'
Gross Amounts Recognized	$145,504		$101,352
Gross Amounts Offset in the Balance Sheet	-9,733		-26,125
Net Amounts Presented in the Balance Sheet	135,771		75,227
Derivative Asset, Fair Value of Collateral	-19,532	[1]	-11,095	[1]
Gross Amounts Not Offset in the Balance Sheet - Cash Collateral Pledged/Received	-103,981	[2]	-51,006	[2]
Net Amount	12,258		13,126
Derivative Liabilities [Abstract]	'		'
Gross Amounts Recognized	18,137		42,336
Gross Amounts Offset in the Balance Sheet	-9,733		-26,125
Net Amounts Presented in the Balance Sheet	8,404		16,211
Gross Amounts Not Offset in the Balance Sheet - Financial Instruments	-23,004	[3]	-18,081	[3]
Gross Amounts Not Offset in the Balance Sheet - Cash Collateral Pledged/Received	0	[4]	-8,033	[4]
Net Amount	($14,600)		($9,903)
[1]	Consists of U.S. Treasury securities.
[2]	Included in cash and cash equivalents, with obligation to return cash collateral recorded in other liabilities.
[3]	Included in other invested assets, primarily consists of U.S. Treasury securities.
[4]	Consists of receivable from counterparty, included in other assets.

Derivative_Instruments_Current

Derivative Instruments (Current Period Cash Flow Hedges in AOCI (loss) before Taxes) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
AOCI Cash Flow Hedges [Roll Forward]	'	'	'	'
Balance beginning	($4,020)	$1,961	($4,578)	$403
Gains (losses) deferred in other comprehensive income (loss) on the effective portion of cash flow hedges	4,798	-6,797	5,574	-4,934
Amounts reclassified to investment income	-321	-201	-539	-506
Balance ending	$457	($5,037)	$457	($5,037)

Derivative_Instruments_Cash_Fl

Derivative Instruments (Cash Flow Hedges) (Details) (Interest Rate Swaps, USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Derivatives In Cash Flow Hedging Relationships [Line Items]	'	'	'	'
Gains Losses Deferred In Accumulated Other Comprehensive Income Loss On Derivatives Effective Portion	$4,798	($6,797)	$5,574	($4,934)
Investment Related Gains Losses [Member]	'	'	'	'
Derivatives In Cash Flow Hedging Relationships [Line Items]	'	'	'	'
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0	0	0	0
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	7	31	1	14
Investment Income [Member]	'	'	'	'
Derivatives In Cash Flow Hedging Relationships [Line Items]	'	'	'	'
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	321	201	539	506
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	$0	$0	$0	$0

Derivative_Instruments_Hedges_

Derivative Instruments (Hedges of Net Investments in Foreign Operations) (Details) (Currency Swap [Member], USD $)	3 Months Ended				6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Currency Swap [Member]	'		'		'		'
Derivatives, Fair Value [Line Items]	'		'		'		'
Net Derivatives Gains (Losses) Deferred in AOCI	($22,335)	[1],[2]	$23,913	[1],[2]	$744	[1],[2]	$34,835	[1],[2]
[1]	There were no sales or substantial liquidations of net investments in foreign operations that would have required the reclassification of gains or losses from accumulated other comprehensive income (loss) into investment income during the periods presented.
[2]	There was no ineffectiveness recognized for the Company’s hedges of net investments in foreign operations.

Derivative_Instruments_Non_Hed

Derivative Instruments (Non Hedging Derivatives and Embedded Derivatives Effect on Income Statement) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Affect Of Non Hedging Derivatives [Line Items]	'	'	'	'
Total investment related gains (losses), net	$118,527	$48,243	$203,098	$142,614
Policy acquisition costs and other insurance expenses	-409,374	-370,505	-764,247	-727,862
Interest credited	-115,962	-118,345	-226,556	-243,828
Not Designated as Hedging Instrument	'	'	'	'
Income Affect Of Non Hedging Derivatives [Line Items]	'	'	'	'
Total investment related gains (losses), net	60,213	3,128	109,732	51,293
Not Designated as Hedging Instrument | Interest Rate Swaps	'	'	'	'
Income Affect Of Non Hedging Derivatives [Line Items]	'	'	'	'
Total investment related gains (losses), net	22,251	-38,415	51,904	-60,679
Not Designated as Hedging Instrument | Interest Rate Options	'	'	'	'
Income Affect Of Non Hedging Derivatives [Line Items]	'	'	'	'
Total investment related gains (losses), net	2,004	-7,981	3,286	-5,998
Not Designated as Hedging Instrument | Financial Futures	'	'	'	'
Income Affect Of Non Hedging Derivatives [Line Items]	'	'	'	'
Total investment related gains (losses), net	-7,684	714	-9,268	-6,167
Not Designated as Hedging Instrument | Foreign Currency Forwards	'	'	'	'
Income Affect Of Non Hedging Derivatives [Line Items]	'	'	'	'
Total investment related gains (losses), net	1,178	-2,958	2,332	-8,617
Not Designated as Hedging Instrument | Consumer Price Index Swaps	'	'	'	'
Income Affect Of Non Hedging Derivatives [Line Items]	'	'	'	'
Total investment related gains (losses), net	114	-1,117	467	-1,988
Not Designated as Hedging Instrument | Credit Default Swaps	'	'	'	'
Income Affect Of Non Hedging Derivatives [Line Items]	'	'	'	'
Total investment related gains (losses), net	4,783	2,427	2,669	6,332
Not Designated as Hedging Instrument | Equity Options	'	'	'	'
Income Affect Of Non Hedging Derivatives [Line Items]	'	'	'	'
Total investment related gains (losses), net	-8,800	-5,049	-17,765	-35,672
Not Designated as Hedging Instrument | Embedded Derivatives In Modified Coinsurance Or Funds Withheld Arrangements	'	'	'	'
Income Affect Of Non Hedging Derivatives [Line Items]	'	'	'	'
Total investment related gains (losses), net	78,835	47,717	156,076	137,974
Not Designated as Hedging Instrument | Embedded Derivatives In Indexed Annuity Products	'	'	'	'
Income Affect Of Non Hedging Derivatives [Line Items]	'	'	'	'
Interest credited	-27,285	-28,019	-51,125	-61,015
Not Designated as Hedging Instrument | Embedded Derivatives In Variable Annuity Products	'	'	'	'
Income Affect Of Non Hedging Derivatives [Line Items]	'	'	'	'
Total investment related gains (losses), net	($5,183)	$35,809	($28,844)	$87,123

Derivative_Instruments_Exposur

Derivative Instruments (Exposure from Credit Derivatives by Rating of the Underlying Credits) (Details) (USD $)	6 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
Credit Derivatives [Line Items]	'		'
Credit Derivative Current Fair Value	$10,767	[1]	$8,565	[1]
Maximum Potential Future Exposure on Credit Risk Derivatives	723,700	[1],[2]	664,700	[1],[2]
Derivative Average Remaining Maturity	'5 years 1 month	[1],[3]	'4 years 5 months	[1],[3]
Standard Poors AAA To A Minus Ratings [Member] | Single Name Credit Default Swaps [Member]	'		'
Credit Derivatives [Line Items]	'		'
Credit Derivative Current Fair Value	1,995	[1]	614	[1]
Maximum Potential Future Exposure on Credit Risk Derivatives	132,500	[1],[2]	117,500	[1],[2]
Derivative Average Remaining Maturity	'4 years 11 months	[1],[3]	'5 years 1 month	[1],[3]
Standard Poors AAA To A Minus Ratings [Member] | Credit Default Swaps Referencing Indices [Member]	'		'
Credit Derivatives [Line Items]	'		'
Credit Derivative Current Fair Value	0	[1]	0	[1]
Maximum Potential Future Exposure on Credit Risk Derivatives	0	[1],[2]	0	[1],[2]
Standard Poors AAA To A Minus Ratings [Member] | Credit Default Subtotal [Member]	'		'
Credit Derivatives [Line Items]	'		'
Credit Derivative Current Fair Value	1,995	[1]	614	[1]
Maximum Potential Future Exposure on Credit Risk Derivatives	132,500	[1],[2]	117,500	[1],[2]
Derivative Average Remaining Maturity	'4 years 11 months	[1],[3]	'5 years 1 month	[1],[3]
Standard Poors BBB Rating [Member] | Single Name Credit Default Swaps [Member]	'		'
Credit Derivatives [Line Items]	'		'
Credit Derivative Current Fair Value	1,218	[1]	656	[1]
Maximum Potential Future Exposure on Credit Risk Derivatives	195,200	[1],[2]	142,200	[1],[2]
Derivative Average Remaining Maturity	'5 years 5 months	[1],[3]	'4 years 11 months	[1],[3]
Standard Poors BBB Rating [Member] | Credit Default Swaps Referencing Indices [Member]	'		'
Credit Derivatives [Line Items]	'		'
Credit Derivative Current Fair Value	7,717	[1]	7,295	[1]
Maximum Potential Future Exposure on Credit Risk Derivatives	391,000	[1],[2]	405,000	[1],[2]
Derivative Average Remaining Maturity	'5 years	[1],[3]	'5 years	[1],[3]
Standard Poors BBB Rating [Member] | Credit Default Subtotal [Member]	'		'
Credit Derivatives [Line Items]	'		'
Credit Derivative Current Fair Value	8,935	[1]	7,951	[1]
Maximum Potential Future Exposure on Credit Risk Derivatives	586,200	[1],[2]	547,200	[1],[2]
Derivative Average Remaining Maturity	'5 years 1 month	[1],[3]	'5 years	[1],[3]
Standard & Poor's, BB Rating [Member]	'		'
Credit Derivatives [Line Items]	'		'
Derivative Average Remaining Maturity	'5 years	[1],[2]	'
Standard & Poor's, BB Rating [Member] | Single Name Credit Default Swaps [Member]	'		'
Credit Derivatives [Line Items]	'		'
Credit Derivative Current Fair Value	-163	[1]	0	[1]
Maximum Potential Future Exposure on Credit Risk Derivatives	5,000	[1],[2]	0	[1],[2]
Standard & Poor's, BB Rating [Member] | Credit Default Swaps Referencing Indices [Member]	'		'
Credit Derivatives [Line Items]	'		'
Credit Derivative Current Fair Value	0	[1]	0	[1]
Maximum Potential Future Exposure on Credit Risk Derivatives	0	[1],[2]	0	[1],[2]
Standard & Poor's, BB Rating [Member] | Credit Default Subtotal [Member]	'		'
Credit Derivatives [Line Items]	'		'
Credit Derivative Current Fair Value	-163	[1]	0	[1]
Maximum Potential Future Exposure on Credit Risk Derivatives	$5,000	[1],[2]	$0	[1],[2]
[1]	The rating agency designations are based on ratings from Standard and Poor’s (“S&P”).
[2]	Assumes the value of the referenced credit obligations is zero.
[3]	The weighted average years to maturity of the credit default swaps is calculated based on weighted average notional amounts.

Derivative_Instruments_Changes

Derivative Instruments (Changes in Estimated Fair Value Related to Embedded Derivatives) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Changes In Estimated Fair Value Related To Embedded Derivatives [Line Items]	'	'	'	'
Total investment related gains (losses), net	$118,527	$48,243	$203,098	$142,614
Total benefits and expenses	2,532,485	2,665,400	4,990,218	4,987,675
Net income (loss)	198,296	-49,612	334,960	135,923
Embedded Derivatives In Modified Coinsurance Or Funds Withheld Arrangements	'	'	'	'
Changes In Estimated Fair Value Related To Embedded Derivatives [Line Items]	'	'	'	'
Total investment related gains (losses), net	78,835	47,717	156,076	137,974
Net income (loss)	17,962	13,911	36,042	35,535
Embedded Derivatives In Equity Indexed Annuities [Member]	'	'	'	'
Changes In Estimated Fair Value Related To Embedded Derivatives [Line Items]	'	'	'	'
Total benefits and expenses	-27,285	-28,019	-51,125	-61,015
Net income (loss)	-15,600	-30,845	-33,976	-60,395
Embedded Derivatives In Variable Annuity Contracts [Member]	'	'	'	'
Changes In Estimated Fair Value Related To Embedded Derivatives [Line Items]	'	'	'	'
Total investment related gains (losses), net	-5,183	35,809	-28,844	87,123
Net income (loss)	($6,486)	$29,082	($20,154)	$41,274

Derivative_Instruments_Credit_

Derivative Instruments (Credit Exposure of Derivative Contracts) (Details) (USD $)	Jun. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Credit Exposure of Derivative Contracts	'		'
Estimated fair value of derivatives in net asset (liability) position	$127,367		$59,016
Derivative, Collateral, Right to Reclaim Cash	0	[1]	8,033	[1]
Derivative Liability, Fair Value of Collateral	23,004	[2]	18,081	[2]
Derivative, Collateral, Obligation to Return Cash	-103,981	[3]	-51,006	[3]
Derivative Asset, Fair Value of Collateral	-19,532	[4]	-11,095	[4]
Deposits with Clearing Organizations and Others, Securities	-13,854		-13,350
Net credit exposure	13,004		9,679
Margin account related to exchange-traded futures	$6,524	[5]	$2,566	[5]
[1]	Consists of receivable from counterparty, included in other assets.
[2]	Included in other invested assets, primarily consists of U.S. Treasury securities.
[3]	Included in cash and cash equivalents, with obligation to return cash collateral recorded in other liabilities.
[4]	Consists of U.S. Treasury securities.
[5]	Included in cash and cash equivalents.

Derivative_Instruments_Narrati

Derivative Instruments (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'	'	'	'	'
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	$1.60	'	$1.60	'	'
Cumulative Foreign Currency Translation Gain Loss Recorded In Accumulated Other Comprehensive Income Loss For Terminated Net Investment In Foreign Operations Hedges	24.7	'	24.7	'	23.9
Gain Loss On Investments Related To Change In Fair Value Of Derivatives Excluding Embedded Derivatives	13.8	-52.4	33.6	-112.8	'
Embedded Derivative Gain Loss In Financial Statements From Use Of Own Credit Risk	0.5	0.4	1.3	2.1	'
Embedded Derivative Gain Loss On Variable Annuity Contracts In Financial Statements From Use Of Own Credit Risk	$0.10	($0.20)	$0.50	($4.90)	'

Fair_Value_of_Assets_and_Liabi2

Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Balances of Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	$24,480,396	$21,474,136
Funds withheld at interest embedded derivatives	-20,194	-176,270
Cash and cash equivalents	516,798	371,345
Short-term investments	21,702	111,572
Other invested assets	445,648	628,992
Total Assets	25,444,350	22,409,775
Liabilities Fair Value Disclosure	'	'
Interest-sensitive contract liabilities - embedded derivatives	940,236	868,725
Total Liabilities	948,640	884,936
Nonredeemable Preferred Stock [Member]	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	86,838	81,854
Other equity securities	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	53,906	323,877
Securities Pledged as Collateral [Member]	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	'	21,283
Other	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	17,407	9,142
Interest Rate Swaps	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	56,229	9,904
Liabilities Fair Value Disclosure	'	'
Other liabilities	865	3,828
Interest Rate Options	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	5,840	2,554
Foreign Currency Forwards	'	'
Liabilities Fair Value Disclosure	'	'
Other liabilities	7,679	12,772
Equity Option	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	39,948	33,869
Liabilities Fair Value Disclosure	'	'
Other liabilities	'	-33
Currency Swap [Member]	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	23,059	'
Fair Value Option Contractholder Directed Unit Linked Investments [Member]	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	151,726	138,892
Consumer Price Index Swaps	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	69	-309
Credit Default Swaps	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	10,626	7,926
Liabilities Fair Value Disclosure	'	'
Other liabilities	-140	-356
Corporate securities	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	14,151,411	12,110,755
Canadian and Canadian provincial governments	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	3,747,638	3,381,025
Residential mortgage-backed securities	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	986,139	989,643
Asset-backed securities	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	1,008,375	894,832
Commercial Mortgage Backed Securities [Member]	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	1,474,620	1,388,946
US Treasury And Government Member	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	448,506	501,351
State and political subdivisions	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	407,487	320,820
Other foreign government, supranational and foreign government-sponsored enterprises	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	2,256,220	1,886,764
Fair Value Inputs Level 1 Member	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	765,188	769,513
Funds withheld at interest embedded derivatives	0	0
Cash and cash equivalents	516,798	371,345
Short-term investments	10,085	105,649
Other invested assets	303,403	539,882
Total Assets	1,595,474	1,786,389
Liabilities Fair Value Disclosure	'	'
Interest-sensitive contract liabilities - embedded derivatives	0	0
Total Liabilities	0	0
Fair Value Inputs Level 1 Member | Nonredeemable Preferred Stock [Member]	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	86,838	74,220
Fair Value Inputs Level 1 Member | Other equity securities	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	53,906	323,877
Fair Value Inputs Level 1 Member | Securities Pledged as Collateral [Member]	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	'	0
Fair Value Inputs Level 1 Member | Other	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	17,407	9,142
Fair Value Inputs Level 1 Member | Interest Rate Swaps	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	0	0
Liabilities Fair Value Disclosure	'	'
Other liabilities	0	0
Fair Value Inputs Level 1 Member | Interest Rate Options	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	0	0
Fair Value Inputs Level 1 Member | Foreign Currency Forwards	'	'
Liabilities Fair Value Disclosure	'	'
Other liabilities	0	0
Fair Value Inputs Level 1 Member | Equity Option	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	0	0
Liabilities Fair Value Disclosure	'	'
Other liabilities	'	0
Fair Value Inputs Level 1 Member | Currency Swap [Member]	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	0	'
Fair Value Inputs Level 1 Member | Fair Value Option Contractholder Directed Unit Linked Investments [Member]	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	145,252	132,643
Fair Value Inputs Level 1 Member | Consumer Price Index Swaps	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	0	0
Fair Value Inputs Level 1 Member | Credit Default Swaps	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	0	0
Liabilities Fair Value Disclosure	'	'
Other liabilities	0	0
Fair Value Inputs Level 1 Member | Corporate securities	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	107,831	68,934
Fair Value Inputs Level 1 Member | Canadian and Canadian provincial governments	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	0	0
Fair Value Inputs Level 1 Member | Residential mortgage-backed securities	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	0	0
Fair Value Inputs Level 1 Member | Asset-backed securities	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	0	0
Fair Value Inputs Level 1 Member | Commercial Mortgage Backed Securities [Member]	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	0	0
Fair Value Inputs Level 1 Member | US Treasury And Government Member	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	350,852	396,092
Fair Value Inputs Level 1 Member | State and political subdivisions	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	0	0
Fair Value Inputs Level 1 Member | Other foreign government, supranational and foreign government-sponsored enterprises	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	306,505	304,487
Fair Value Inputs Level 2 Member	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	21,497,998	18,509,504
Funds withheld at interest embedded derivatives	0	0
Cash and cash equivalents	0	0
Short-term investments	11,617	5,923
Other invested assets	142,245	84,148
Total Assets	21,651,860	18,599,575
Liabilities Fair Value Disclosure	'	'
Interest-sensitive contract liabilities - embedded derivatives	0	0
Total Liabilities	8,404	16,211
Fair Value Inputs Level 2 Member | Nonredeemable Preferred Stock [Member]	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	0	2,672
Fair Value Inputs Level 2 Member | Other equity securities	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	0	0
Fair Value Inputs Level 2 Member | Securities Pledged as Collateral [Member]	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	'	21,283
Fair Value Inputs Level 2 Member | Other	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	0	0
Fair Value Inputs Level 2 Member | Interest Rate Swaps	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	56,229	9,904
Liabilities Fair Value Disclosure	'	'
Other liabilities	865	3,828
Fair Value Inputs Level 2 Member | Interest Rate Options	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	5,840	2,554
Fair Value Inputs Level 2 Member | Foreign Currency Forwards	'	'
Liabilities Fair Value Disclosure	'	'
Other liabilities	7,679	12,772
Fair Value Inputs Level 2 Member | Equity Option	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	39,948	33,869
Liabilities Fair Value Disclosure	'	'
Other liabilities	'	-33
Fair Value Inputs Level 2 Member | Currency Swap [Member]	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	23,059	'
Fair Value Inputs Level 2 Member | Fair Value Option Contractholder Directed Unit Linked Investments [Member]	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	6,474	6,249
Fair Value Inputs Level 2 Member | Consumer Price Index Swaps	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	69	-309
Fair Value Inputs Level 2 Member | Credit Default Swaps	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	10,626	7,926
Liabilities Fair Value Disclosure	'	'
Other liabilities	-140	-356
Fair Value Inputs Level 2 Member | Corporate securities	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	12,755,640	10,696,532
Fair Value Inputs Level 2 Member | Canadian and Canadian provincial governments	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	3,747,638	3,381,025
Fair Value Inputs Level 2 Member | Residential mortgage-backed securities	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	800,592	836,138
Fair Value Inputs Level 2 Member | Asset-backed securities	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	452,215	422,984
Fair Value Inputs Level 2 Member | Commercial Mortgage Backed Securities [Member]	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	1,376,706	1,287,161
Fair Value Inputs Level 2 Member | US Treasury And Government Member	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	64,660	64,340
Fair Value Inputs Level 2 Member | State and political subdivisions	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	361,720	277,044
Fair Value Inputs Level 2 Member | Other foreign government, supranational and foreign government-sponsored enterprises	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	1,938,827	1,544,280
Fair Value Inputs Level 3 Member	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	2,217,210	2,195,119
Funds withheld at interest embedded derivatives	-20,194	-176,270
Cash and cash equivalents	0	0
Short-term investments	0	0
Other invested assets	0	4,962
Total Assets	2,197,016	2,023,811
Liabilities Fair Value Disclosure	'	'
Interest-sensitive contract liabilities - embedded derivatives	940,236	868,725
Total Liabilities	940,236	868,725
Fair Value Inputs Level 3 Member | Nonredeemable Preferred Stock [Member]	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	0	4,962
Fair Value Inputs Level 3 Member | Other equity securities	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	0	0
Fair Value Inputs Level 3 Member | Securities Pledged as Collateral [Member]	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	'	0
Fair Value Inputs Level 3 Member | Other	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	0	0
Fair Value Inputs Level 3 Member | Interest Rate Swaps	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	0	0
Liabilities Fair Value Disclosure	'	'
Other liabilities	0	0
Fair Value Inputs Level 3 Member | Interest Rate Options	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	0	0
Fair Value Inputs Level 3 Member | Foreign Currency Forwards	'	'
Liabilities Fair Value Disclosure	'	'
Other liabilities	0	0
Fair Value Inputs Level 3 Member | Equity Option	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	0	0
Liabilities Fair Value Disclosure	'	'
Other liabilities	'	0
Fair Value Inputs Level 3 Member | Currency Swap [Member]	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	0	'
Fair Value Inputs Level 3 Member | Fair Value Option Contractholder Directed Unit Linked Investments [Member]	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	0	0
Fair Value Inputs Level 3 Member | Consumer Price Index Swaps	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	0	0
Fair Value Inputs Level 3 Member | Credit Default Swaps	'	'
Assets Fair Value Disclosure	'	'
Other invested assets	0	0
Liabilities Fair Value Disclosure	'	'
Other liabilities	0	0
Fair Value Inputs Level 3 Member | Corporate securities	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	1,287,940	1,345,289
Fair Value Inputs Level 3 Member | Canadian and Canadian provincial governments	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	0	0
Fair Value Inputs Level 3 Member | Residential mortgage-backed securities	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	185,547	153,505
Fair Value Inputs Level 3 Member | Asset-backed securities	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	556,160	471,848
Fair Value Inputs Level 3 Member | Commercial Mortgage Backed Securities [Member]	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	97,914	101,785
Fair Value Inputs Level 3 Member | US Treasury And Government Member	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	32,994	40,919
Fair Value Inputs Level 3 Member | State and political subdivisions	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	45,767	43,776
Fair Value Inputs Level 3 Member | Other foreign government, supranational and foreign government-sponsored enterprises	'	'
Assets Fair Value Disclosure	'	'
Fixed maturity securities, available-for-sale	$10,888	$37,997

Fair_Value_of_Assets_and_Liabi3

Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Quantitative Information for Level 3 Inputs) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Discounted Cash Flow [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Interest-sensitive contract liabilities - embedded derivatives - indexed annuities	$881,337	$838,670
Interest-sensitive contract liabilities - embedded derivatives - variable annuities	58,899	30,055
Total Return Swap [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Funds withheld at interest - embedded derivatives	-20,194	176,270
Market Comparable Securities [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
State And Political Subdivision Securities	16,951	'
Corporate Securities	256,581	'
Financial Instruments, Owned, US Government and Agency Obligations, at Fair Value	32,994	37,539
Market Comparable Securities [Member] | Liquidity Premium [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
State And Political Subdivision Securities	'	29,024
Corporate Securities	'	$312,887
Minimum [Member] | Discounted Cash Flow [Member] | Mortality [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Interest-sensitive contract liabilities - embedded derivatives - indexed annuities Unobservable Input Range	0.00%	0.00%
Interest-sensitive contract liabilities - embedded derivatives - variable annuities Unobservable Input Range	0.00%	0.00%
Minimum [Member] | Discounted Cash Flow [Member] | Lapse [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Interest-sensitive contract liabilities - embedded derivatives - indexed annuities Unobservable Input Range	0.00%	0.00%
Interest-sensitive contract liabilities - embedded derivatives - variable annuities Unobservable Input Range	0.00%	0.00%
Minimum [Member] | Discounted Cash Flow [Member] | Withdrawal [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Interest-sensitive contract liabilities - embedded derivatives - indexed annuities Unobservable Input Range	0.00%	0.00%
Interest-sensitive contract liabilities - embedded derivatives - variable annuities Unobservable Input Range	0.00%	0.00%
Minimum [Member] | Discounted Cash Flow [Member] | Own Credit [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Interest-sensitive contract liabilities - embedded derivatives - variable annuities Unobservable Input Range	0.00%	0.00%
Minimum [Member] | Discounted Cash Flow [Member] | Option Budget Projection [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Interest-sensitive contract liabilities - embedded derivatives - indexed annuities Unobservable Input Range	2.00%	2.00%
Minimum [Member] | Discounted Cash Flow [Member] | Long Term Volatility [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Interest-sensitive contract liabilities - embedded derivatives - variable annuities Unobservable Input Range	0.00%	0.00%
Minimum [Member] | Total Return Swap [Member] | Mortality [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Funds withheld at interest - embedded derivatives Unobservable Input Range	0.00%	0.00%
Minimum [Member] | Total Return Swap [Member] | Lapse [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Funds withheld at interest - embedded derivatives Unobservable Input Range	0.00%	0.00%
Minimum [Member] | Total Return Swap [Member] | Withdrawal [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Funds withheld at interest - embedded derivatives Unobservable Input Range	0.00%	0.00%
Minimum [Member] | Total Return Swap [Member] | Own Credit [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Funds withheld at interest - embedded derivatives Unobservable Input Range	0.00%	0.00%
Minimum [Member] | Total Return Swap [Member] | Crediting Rate [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Funds withheld at interest - embedded derivatives Unobservable Input Range	2.00%	2.00%
Minimum [Member] | Market Comparable Securities [Member] | Liquidity Premium [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
US Government And Agencies Securities Unobservable Input Range	0.00%	0.00%
Corporate Securities Unobservable Input Range	0.00%	0.00%
State And Political Subdivision Securities Unobservable Input Range	1.00%	1.00%
Maximum [Member] | Discounted Cash Flow [Member] | Mortality [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Interest-sensitive contract liabilities - embedded derivatives - indexed annuities Unobservable Input Range	100.00%	100.00%
Interest-sensitive contract liabilities - embedded derivatives - variable annuities Unobservable Input Range	100.00%	100.00%
Maximum [Member] | Discounted Cash Flow [Member] | Lapse [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Interest-sensitive contract liabilities - embedded derivatives - indexed annuities Unobservable Input Range	35.00%	35.00%
Interest-sensitive contract liabilities - embedded derivatives - variable annuities Unobservable Input Range	25.00%	25.00%
Maximum [Member] | Discounted Cash Flow [Member] | Withdrawal [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Interest-sensitive contract liabilities - embedded derivatives - indexed annuities Unobservable Input Range	5.00%	5.00%
Interest-sensitive contract liabilities - embedded derivatives - variable annuities Unobservable Input Range	7.00%	7.00%
Maximum [Member] | Discounted Cash Flow [Member] | Own Credit [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Interest-sensitive contract liabilities - embedded derivatives - variable annuities Unobservable Input Range	1.00%	1.00%
Maximum [Member] | Discounted Cash Flow [Member] | Option Budget Projection [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Interest-sensitive contract liabilities - embedded derivatives - indexed annuities Unobservable Input Range	4.00%	4.00%
Maximum [Member] | Discounted Cash Flow [Member] | Long Term Volatility [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Interest-sensitive contract liabilities - embedded derivatives - variable annuities Unobservable Input Range	27.00%	27.00%
Maximum [Member] | Total Return Swap [Member] | Mortality [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Funds withheld at interest - embedded derivatives Unobservable Input Range	100.00%	100.00%
Maximum [Member] | Total Return Swap [Member] | Lapse [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Funds withheld at interest - embedded derivatives Unobservable Input Range	35.00%	35.00%
Maximum [Member] | Total Return Swap [Member] | Withdrawal [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Funds withheld at interest - embedded derivatives Unobservable Input Range	5.00%	5.00%
Maximum [Member] | Total Return Swap [Member] | Own Credit [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Funds withheld at interest - embedded derivatives Unobservable Input Range	1.00%	1.00%
Maximum [Member] | Total Return Swap [Member] | Crediting Rate [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Funds withheld at interest - embedded derivatives Unobservable Input Range	4.00%	4.00%
Maximum [Member] | Market Comparable Securities [Member] | Liquidity Premium [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
US Government And Agencies Securities Unobservable Input Range	1.00%	1.00%
Corporate Securities Unobservable Input Range	2.00%	2.00%
State And Political Subdivision Securities Unobservable Input Range	1.00%	1.00%
Weighted Average [Member] | Discounted Cash Flow [Member] | Mortality [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Interest-sensitive contract liabilities - embedded derivatives - indexed annuities Unobservable Input Range	2.00%	2.00%
Interest-sensitive contract liabilities - embedded derivatives - variable annuities Unobservable Input Range	2.00%	2.00%
Weighted Average [Member] | Discounted Cash Flow [Member] | Lapse [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Interest-sensitive contract liabilities - embedded derivatives - indexed annuities Unobservable Input Range	7.00%	7.00%
Interest-sensitive contract liabilities - embedded derivatives - variable annuities Unobservable Input Range	8.00%	6.00%
Weighted Average [Member] | Discounted Cash Flow [Member] | Withdrawal [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Interest-sensitive contract liabilities - embedded derivatives - indexed annuities Unobservable Input Range	3.00%	3.00%
Interest-sensitive contract liabilities - embedded derivatives - variable annuities Unobservable Input Range	3.00%	3.00%
Weighted Average [Member] | Discounted Cash Flow [Member] | Own Credit [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Interest-sensitive contract liabilities - embedded derivatives - variable annuities Unobservable Input Range	1.00%	1.00%
Weighted Average [Member] | Discounted Cash Flow [Member] | Option Budget Projection [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Interest-sensitive contract liabilities - embedded derivatives - indexed annuities Unobservable Input Range	3.00%	3.00%
Weighted Average [Member] | Discounted Cash Flow [Member] | Long Term Volatility [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Interest-sensitive contract liabilities - embedded derivatives - variable annuities Unobservable Input Range	15.00%	10.00%
Weighted Average [Member] | Total Return Swap [Member] | Mortality [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Funds withheld at interest - embedded derivatives Unobservable Input Range	2.00%	2.00%
Weighted Average [Member] | Total Return Swap [Member] | Lapse [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Funds withheld at interest - embedded derivatives Unobservable Input Range	7.00%	7.00%
Weighted Average [Member] | Total Return Swap [Member] | Withdrawal [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Funds withheld at interest - embedded derivatives Unobservable Input Range	3.00%	3.00%
Weighted Average [Member] | Total Return Swap [Member] | Own Credit [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Funds withheld at interest - embedded derivatives Unobservable Input Range	1.00%	1.00%
Weighted Average [Member] | Total Return Swap [Member] | Crediting Rate [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
Funds withheld at interest - embedded derivatives Unobservable Input Range	3.00%	3.00%
Weighted Average [Member] | Market Comparable Securities [Member] | Liquidity Premium [Member]	'	'
Unobservable Inputs Used In Level 3 Fair Value Measurements [Line Items]	'	'
US Government And Agencies Securities Unobservable Input Range	1.00%	1.00%
Corporate Securities Unobservable Input Range	1.00%	1.00%
State And Political Subdivision Securities Unobservable Input Range	1.00%	1.00%

Fair_Value_of_Assets_and_Liabi4

Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Fair Value Assets Transfers between Level 1 and Level 2) (Details) (Available-for-sale Securities [Member])	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'
Fair Value, Equity, Level 1 to Level 2 Transfers, Description	'0	'0	'0	'0
Fair Value, Equity, Level 2 to Level 1 Transfers, Description	'10058	'0	'10058	'14012
Corporate securities	'	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'
Fair Value, Equity, Level 1 to Level 2 Transfers, Description	'0	'0	'0	'0
Fair Value, Equity, Level 2 to Level 1 Transfers, Description	'10058	'0	'10058	'14012

Fair_Value_of_Assets_and_Liabi5

Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Changes in Level 3 Assets and Liabilities) (Details) (USD $)	3 Months Ended				6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Funds Withheld At Interest Embedded Derivatives [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	($99,029)		($156,189)		($176,270)		($243,177)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	0		0		0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	0	[1]	0	[1]	0	[1]	0	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	0	[1]	0	[1]	0	[1]	0	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	0	[1]	0	[1]	0	[1]	0	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0		0		0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	0		0		0		0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	-20,194		-108,473		-20,194		-108,473
Funds Withheld At Interest Embedded Derivatives [Member] | Investment Income [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0		0		0		0
Funds Withheld At Interest Embedded Derivatives [Member] | Investment Related Gains Losses [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	78,835		47,717		156,076		134,705
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	78,835		47,716		156,076		134,704
Funds Withheld At Interest Embedded Derivatives [Member] | Insurance Claims [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0		0		0		0
Funds Withheld At Interest Embedded Derivatives [Member] | Interest Income [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0		0		0		0
Funds Withheld At Interest Embedded Derivatives [Member] | Policy Acquisition Costs And Other Insurance Expenses [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0		0		0		0
Short-term Debt [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	'		22,001		'		22,031
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	'		-1		'		-28
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	'		0	[1]	'		0	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	'		0	[1]	'		0	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	'		-22,000	[1]	'		-22,000	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	'		0		'		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	'		0		'		0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	'		0		'		0
Short-term Debt [Member] | Investment Income [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	'		0		'		-4
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	'		0		'		-3
Short-term Debt [Member] | Investment Related Gains Losses [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	'		0		'		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	'		0		'		0
Short-term Debt [Member] | Insurance Claims [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	'		0		'		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	'		0		'		0
Short-term Debt [Member] | Interest Income [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	'		0		'		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	'		0		'		0
Short-term Debt [Member] | Policy Acquisition Costs And Other Insurance Expenses [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	'		0		'		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	'		0		'		0
Nonredeemable Preferred Stock [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	'		'		4,962		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	'		'		0		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	'		'		0	[1]	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	'		'		0	[1]	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	'		'		0	[1]	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	'		'		0		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	'		'		-4,962		'
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	0		'		0		'
Nonredeemable Preferred Stock [Member] | Investment Income [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	'		'		0		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	'		'		0		'
Nonredeemable Preferred Stock [Member] | Investment Related Gains Losses [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	'		'		0		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	'		'		0		'
Nonredeemable Preferred Stock [Member] | Insurance Claims [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	'		'		0		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	'		'		0		'
Nonredeemable Preferred Stock [Member] | Interest Income [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	'		'		0		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	'		'		0		'
Nonredeemable Preferred Stock [Member] | Policy Acquisition Costs And Other Insurance Expenses [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	'		'		0		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	'		'		0		'
Interest Sensitive Contract Liabilities Embedded Derivatives [Member]	'		'		'		'
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	-911,987		-890,476		-868,725		-912,361
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss)	0		0		0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases	-14,215	[1]	-14,764	[1]	-29,408	[1]	-28,624	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales	0	[1]	0	[1]	0	[1]	0	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements	18,433	[1]	18,883	[1]	37,866	[1]	36,310	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3	0		0		0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3	0		0		0		0
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	-940,236		-878,568		-940,236		-878,568
Interest Sensitive Contract Liabilities Embedded Derivatives [Member] | Investment Income [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	0		0		0		0
Interest Sensitive Contract Liabilities Embedded Derivatives [Member] | Investment Related Gains Losses [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)	-5,946		34,788		-30,156		84,911
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	-5,182		35,809		-28,844		87,123
Interest Sensitive Contract Liabilities Embedded Derivatives [Member] | Insurance Claims [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	0		0		0		0
Interest Sensitive Contract Liabilities Embedded Derivatives [Member] | Interest Income [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)	-45,718		-46,902		-88,991		-97,326
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	-27,285		-28,020		-51,125		-61,016
Interest Sensitive Contract Liabilities Embedded Derivatives [Member] | Policy Acquisition Costs And Other Insurance Expenses [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	0		0		0		0
Available-for-sale Securities [Member] | Corporate securities	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	1,291,701		1,646,903		1,345,289		1,668,563
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	6,086		-37,672		8,536		-36,710
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	52,549	[1]	100,690	[1]	132,061	[1]	175,362	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	-8,929	[1]	-39,793	[1]	-47,676	[1]	-56,071	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	-49,002	[1]	-80,533	[1]	-100,946	[1]	-145,899	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0		4,373		6,930		8,146
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	-3,357		0		-53,874		-16,134
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	1,287,940		1,592,005		1,287,940		1,592,005
Available-for-sale Securities [Member] | Corporate securities | Investment Income [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	-1,274		-2,191		-2,336		-4,218
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	-1,273		-2,313		-2,385		-4,339
Available-for-sale Securities [Member] | Corporate securities | Investment Related Gains Losses [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		-202
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	165		350		5		-913
Available-for-sale Securities [Member] | Corporate securities | Insurance Claims [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0		0		0		0
Available-for-sale Securities [Member] | Corporate securities | Interest Income [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0		0		0		0
Available-for-sale Securities [Member] | Corporate securities | Policy Acquisition Costs And Other Insurance Expenses [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0		0		0		0
Available-for-sale Securities [Member] | Residential mortgage-backed securities	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	177,927		140,717		153,505		93,931
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	368		-2,714		3,255		-200
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	13,398	[1]	11,383	[1]	32,148	[1]	51,920	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	0	[1]	-1,018	[1]	-744	[1]	-2,617	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	-6,401	[1]	-7,367	[1]	-12,573	[1]	-12,289	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	901		4,306		11,464		14,630
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	-719		-5,340		-1,743		-5,340
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	185,547		140,054		185,547		140,054
Available-for-sale Securities [Member] | Residential mortgage-backed securities | Investment Income [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	42		-112		94		-7
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	42		-111		98		-6
Available-for-sale Securities [Member] | Residential mortgage-backed securities | Investment Related Gains Losses [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	31		198		137		25
Available-for-sale Securities [Member] | Residential mortgage-backed securities | Insurance Claims [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0		0		0		0
Available-for-sale Securities [Member] | Residential mortgage-backed securities | Interest Income [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0		0		0		0
Available-for-sale Securities [Member] | Residential mortgage-backed securities | Policy Acquisition Costs And Other Insurance Expenses [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0		0		0		0
Available-for-sale Securities [Member] | Asset-backed securities	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	502,675		288,231		471,848		232,391
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	514		2,601		6,014		14,638
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	64,884	[1]	72,542	[1]	124,108	[1]	128,423	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	-14,258	[1]	-7,995	[1]	-20,870	[1]	-16,293	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	-6,318	[1]	-5,559	[1]	-12,633	[1]	-11,436	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	5,666		5,340		11,614		8,305
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	0		-4,306		-29,280		-4,306
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	556,160		352,606		556,160		352,606
Available-for-sale Securities [Member] | Asset-backed securities | Investment Income [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	2,005		1,515		2,005		2,397
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	2,055		1,526		4,112		2,405
Available-for-sale Securities [Member] | Asset-backed securities | Investment Related Gains Losses [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	942		226		1,247		-1,521
Available-for-sale Securities [Member] | Asset-backed securities | Insurance Claims [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0		0		0		0
Available-for-sale Securities [Member] | Asset-backed securities | Interest Income [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0		0		0		0
Available-for-sale Securities [Member] | Asset-backed securities | Policy Acquisition Costs And Other Insurance Expenses [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0		0		0		0
Available-for-sale Securities [Member] | Commercial Mortgage Backed Securities [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	90,373		175,294		101,785		167,006
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	1,639		15,445		4,674		27,945
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	0	[1]	0	[1]	0	[1]	0	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	0	[1]	-1,118	[1]	-14,626	[1]	-2,722	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	-263	[1]	-228	[1]	-542	[1]	-2,468	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	5,712		0		5,712		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	0		0		0		0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	97,914		180,982		97,914		180,982
Available-for-sale Securities [Member] | Commercial Mortgage Backed Securities [Member] | Investment Income [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	447		580		875		1,081
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	447		581		819		1,083
Available-for-sale Securities [Member] | Commercial Mortgage Backed Securities [Member] | Investment Related Gains Losses [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		-10,109		0		-10,109
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	6		-8,992		92		-9,862
Available-for-sale Securities [Member] | Commercial Mortgage Backed Securities [Member] | Insurance Claims [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0		0		0		0
Available-for-sale Securities [Member] | Commercial Mortgage Backed Securities [Member] | Interest Income [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0		0		0		0
Available-for-sale Securities [Member] | Commercial Mortgage Backed Securities [Member] | Policy Acquisition Costs And Other Insurance Expenses [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0		0		0		0
Available-for-sale Securities [Member] | US Treasury And Government Member	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	38,031		'		40,919		4,538
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	572		'		877		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	165	[1]	'		293	[1]	0	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	0	[1]	'		0	[1]	0	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	-5,534	[1]	'		-8,563	[1]	0	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0		'		0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	0		'		0		-4,538
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	32,994		0		32,994		0
Available-for-sale Securities [Member] | US Treasury And Government Member | Investment Income [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	-185		'		-282		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	-185		'		-282		0
Available-for-sale Securities [Member] | US Treasury And Government Member | Investment Related Gains Losses [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		'		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	-55		'		-250		0
Available-for-sale Securities [Member] | US Treasury And Government Member | Insurance Claims [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		'		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0		'		0		0
Available-for-sale Securities [Member] | US Treasury And Government Member | Interest Income [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		'		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0		'		0		0
Available-for-sale Securities [Member] | US Treasury And Government Member | Policy Acquisition Costs And Other Insurance Expenses [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		'		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0		'		0		0
Available-for-sale Securities [Member] | State and political subdivisions	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	43,833		42,639		43,776		43,212
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	2,330		-1,087		2,443		-1,639
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	0	[1]	0	[1]	0	[1]	0	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	0	[1]	0	[1]	0	[1]	0	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	-402	[1]	-282	[1]	-465	[1]	-308	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0		0		0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	0		0		0		0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	45,767		41,275		45,767		41,275
Available-for-sale Securities [Member] | State and political subdivisions | Investment Income [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	10		9		21		18
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	10		9		21		18
Available-for-sale Securities [Member] | State and political subdivisions | Investment Related Gains Losses [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	-4		-4		-8		-8
Available-for-sale Securities [Member] | State and political subdivisions | Insurance Claims [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0		0		0		0
Available-for-sale Securities [Member] | State and political subdivisions | Interest Income [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0		0		0		0
Available-for-sale Securities [Member] | State and political subdivisions | Policy Acquisition Costs And Other Insurance Expenses [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0		0		0		0
Available-for-sale Securities [Member] | Other foreign government, supranational and foreign government-sponsored enterprises	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	11,157		27,865		37,997		28,280
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	33		-959		33		-1,300
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	0	[1]	0	[1]	0	[1]	0	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	0	[1]	0	[1]	0	[1]	0	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	-302	[1]	0	[1]	-599	[1]	0	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0		0		0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	0		0		-26,543		0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	10,888		26,830		10,888		26,830
Available-for-sale Securities [Member] | Other foreign government, supranational and foreign government-sponsored enterprises | Investment Income [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		-76		0		-150
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0		-76		0		-150
Available-for-sale Securities [Member] | Other foreign government, supranational and foreign government-sponsored enterprises | Investment Related Gains Losses [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0		0		0		0
Available-for-sale Securities [Member] | Other foreign government, supranational and foreign government-sponsored enterprises | Insurance Claims [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0		0		0		0
Available-for-sale Securities [Member] | Other foreign government, supranational and foreign government-sponsored enterprises | Interest Income [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0		0		0		0
Available-for-sale Securities [Member] | Other foreign government, supranational and foreign government-sponsored enterprises | Policy Acquisition Costs And Other Insurance Expenses [Member]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'		'		'		'
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0		0		0		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	$0		$0		$0		$0
[1]	The amount reported within purchases, sales and settlements is the purchase price (for purchases) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased or sold/settled. Items purchased and sold/settled in the same period are excluded from the rollforward. The Company had no issuances during the period.

Fair_Value_of_Assets_and_Liabi6

Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Fair Value Assets Measured on Non-Recurring Basis) (Details) (USD $)

3 Months Ended

6 Months Ended

In Thousands, unless otherwise specified

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2013

Dec. 31, 2012

Mortgage Loans on Real Estate [Member]

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value Assets Carrying Value Prior To Impairment

'

'

$15,660

[1]

$13,575

[1]

'

'

'

'

Fair Value Assets Gains Losses

-2,037

[1]

-27

[1]

-1,656

[1]

93

[1]

'

'

'

'

Partnership Interest [Member]

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value Assets Carrying Value Prior To Impairment

'

'

8,889

[2]

9,161

[2]

'

'

'

'

Fair Value Assets Gains Losses

-4,171

[2]

0

[2]

-4,171

[2]

-2,429

[2]

'

'

'

'

Real Estate Investment [Member]

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value Assets Carrying Value Prior To Impairment

'

'

0

[3]

4,136

[3]

'

'

'

'

Fair Value Assets Gains Losses

0

[3]

-600

[3]

0

[3]

-600

[3]

'

'

'

'

Short-term Debt [Member]

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value

'

'

'

'

'

'

22,001

22,031

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)

'

-1

'

-28

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases

'

0

[4]

'

0

[4]

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales

'

0

[4]

'

0

[4]

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements

'

-22,000

[4]

'

-22,000

[4]

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3

'

0

'

0

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3

'

0

'

0

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value

'

0

'

0

'

'

'

'

Funds Withheld At Interest Embedded Derivatives [Member]

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value

'

'

'

'

-99,029

-176,270

-156,189

-243,177

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)

0

0

0

0

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases

0

[4]

0

[4]

0

[4]

0

[4]

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales

0

[4]

0

[4]

0

[4]

0

[4]

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements

0

[4]

0

[4]

0

[4]

0

[4]

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3

0

0

0

0

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3

0

0

0

0

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value

-20,194

-108,473

-20,194

-108,473

'

'

'

'

Nonredeemable Preferred Stock [Member]

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value

'

'

'

'

'

4,962

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)

'

'

0

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases

'

'

0

[4]

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales

'

'

0

[4]

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements

'

'

0

[4]

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3

'

'

0

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3

'

'

-4,962

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value

0

'

0

'

'

'

'

'

Investment Income [Member] | Short-term Debt [Member]

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings

'

0

'

-3

'

'

'

'

Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)

'

0

'

-4

'

'

'

'

Investment Income [Member] | Funds Withheld At Interest Embedded Derivatives [Member]

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings

0

0

0

0

'

'

'

'

Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)

0

0

0

0

'

'

'

'

Investment Income [Member] | Nonredeemable Preferred Stock [Member]

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings

'

'

0

'

'

'

'

'

Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)

'

'

0

'

'

'

'

'

Policy Acquisition Costs And Other Insurance Expenses [Member] | Short-term Debt [Member]

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings

'

0

'

0

'

'

'

'

Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)

'

0

'

0

'

'

'

'

Policy Acquisition Costs And Other Insurance Expenses [Member] | Funds Withheld At Interest Embedded Derivatives [Member]

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings

0

0

0

0

'

'

'

'

Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)

0

0

0

0

'

'

'

'

Policy Acquisition Costs And Other Insurance Expenses [Member] | Nonredeemable Preferred Stock [Member]

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings

'

'

0

'

'

'

'

'

Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)

'

'

0

'

'

'

'

'

Investment Related Gains Losses [Member] | Short-term Debt [Member]

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings

'

0

'

0

'

'

'

'

Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)

'

0

'

0

'

'

'

'

Investment Related Gains Losses [Member] | Funds Withheld At Interest Embedded Derivatives [Member]

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings

78,835

47,716

156,076

134,704

'

'

'

'

Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)

78,835

47,717

156,076

134,705

'

'

'

'

Investment Related Gains Losses [Member] | Nonredeemable Preferred Stock [Member]

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings

'

'

0

'

'

'

'

'

Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)

'

'

0

'

'

'

'

'

Insurance Claims [Member] | Short-term Debt [Member]

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings

'

0

'

0

'

'

'

'

Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)

'

0

'

0

'

'

'

'

Insurance Claims [Member] | Funds Withheld At Interest Embedded Derivatives [Member]

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings

0

0

0

0

'

'

'

'

Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)

0

0

0

0

'

'

'

'

Insurance Claims [Member] | Nonredeemable Preferred Stock [Member]

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings

'

'

0

'

'

'

'

'

Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)

'

'

0

'

'

'

'

'

Interest Income [Member] | Short-term Debt [Member]

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings

'

0

'

0

'

'

'

'

Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)

'

0

'

0

'

'

'

'

Interest Income [Member] | Funds Withheld At Interest Embedded Derivatives [Member]

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings

0

0

0

0

'

'

'

'

Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)

0

0

0

0

'

'

'

'

Interest Income [Member] | Nonredeemable Preferred Stock [Member]

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings

'

'

0

'

'

'

'

'

Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)

'

'

0

'

'

'

'

'

Available-for-sale Securities [Member] | Commercial Mortgage Backed Securities [Member]

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value

'

'

'

'

90,373

101,785

175,294

167,006

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)

1,639

15,445

4,674

27,945

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases

0

[4]

0

[4]

0

[4]

0

[4]

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales

0

[4]

-1,118

[4]

-14,626

[4]

-2,722

[4]

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements

-263

[4]

-228

[4]

-542

[4]

-2,468

[4]

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3

5,712

0

5,712

0

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3

0

0

0

0

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value

97,914

180,982

97,914

180,982

'

'

'

'

Available-for-sale Securities [Member] | US Treasury And Government Member

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value

'

'

'

'

38,031

40,919

'

4,538

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)

572

'

877

0

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases

165

[4]

'

293

[4]

0

[4]

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales

0

[4]

'

0

[4]

0

[4]

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements

-5,534

[4]

'

-8,563

[4]

0

[4]

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3

0

'

0

0

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3

0

'

0

-4,538

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value

32,994

0

32,994

0

'

'

'

'

Available-for-sale Securities [Member] | Investment Income [Member] | Commercial Mortgage Backed Securities [Member]

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings

447

581

819

1,083

'

'

'

'

Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)

447

580

875

1,081

'

'

'

'

Available-for-sale Securities [Member] | Investment Income [Member] | US Treasury And Government Member

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings

-185

'

-282

0

'

'

'

'

Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)

-185

'

-282

0

'

'

'

'

Available-for-sale Securities [Member] | Policy Acquisition Costs And Other Insurance Expenses [Member] | Commercial Mortgage Backed Securities [Member]

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings

0

0

0

0

'

'

'

'

Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)

0

0

0

0

'

'

'

'

Available-for-sale Securities [Member] | Policy Acquisition Costs And Other Insurance Expenses [Member] | US Treasury And Government Member

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings

0

'

0

0

'

'

'

'

Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)

0

'

0

0

'

'

'

'

Available-for-sale Securities [Member] | Investment Related Gains Losses [Member] | Commercial Mortgage Backed Securities [Member]

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings

6

-8,992

92

-9,862

'

'

'

'

Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)

0

-10,109

0

-10,109

'

'

'

'

Available-for-sale Securities [Member] | Investment Related Gains Losses [Member] | US Treasury And Government Member

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings

-55

'

-250

0

'

'

'

'

Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)

0

'

0

0

'

'

'

'

Available-for-sale Securities [Member] | Insurance Claims [Member] | Commercial Mortgage Backed Securities [Member]

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings

0

0

0

0

'

'

'

'

Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)

0

0

0

0

'

'

'

'

Available-for-sale Securities [Member] | Insurance Claims [Member] | US Treasury And Government Member

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings

0

'

0

0

'

'

'

'

Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)

0

'

0

0

'

'

'

'

Available-for-sale Securities [Member] | Interest Income [Member] | Commercial Mortgage Backed Securities [Member]

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings

0

0

0

0

'

'

'

'

Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)

0

0

0

0

'

'

'

'

Available-for-sale Securities [Member] | Interest Income [Member] | US Treasury And Government Member

'

'

'

'

'

'

'

'

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings

0

'

0

0

'

'

'

'

Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)

$0

'

$0

$0

'

'

'

'

[1]

Mortgage loans — The impaired mortgage loans presented above were written down to their estimated fair values at the date the impairments were recognized and are reported as losses above. Subsequent improvements in estimated fair value on previously impaired loans recorded through a reduction in the previously established valuation allowance are reported as gains above. Nonrecurring fair value adjustments on mortgage loans are based on the fair value of underlying collateral or discounted cash flows.

[2]

Limited partnership interests — The impaired limited partnership interests presented above were accounted for using the cost method. Impairments on these cost method investments were recognized at estimated fair value determined using the net asset values of the Company’s ownership interest as provided in the financial statements of the investees. The market for these investments has limited activity and price transparency.

[3]

Real estate investments — The impaired real estate investments presented above were written down to their estimated fair value at the date of impairment and are reported as losses above. The impairments were based on third-party appraisal values obtained and reviewed by the Company.

[4]

The amount reported within purchases, sales and settlements is the purchase price (for purchases) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased or sold/settled. Items purchased and sold/settled in the same period are excluded from the rollforward. The Company had no issuances during the period.

Fair_Value_of_Assets_and_Liabi7

Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Financial Instruments where Carrying Amounts and Fair Values May Differ) (Details) (USD $)	Jun. 30, 2014		Dec. 31, 2013		Jun. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Assets	'		'		'	'
Mortgage loans on real estate (net of valuation allowances)	$2,555,800		$2,486,680		'	'
Policy loans	1,250,635		1,244,469		'	'
Funds withheld at interest	5,940,521		5,771,467		'	'
Cash and cash equivalents	1,378,117		923,647		973,619	1,259,892
Short-term investments	45,596		139,395		'	'
Other invested assets	1,128,375		1,324,960		'	'
Accrued investment income	279,368		267,908		'	'
Liabilities	'		'		'	'
Interest-sensitive contract liabilities	12,686,025		12,947,557		'	'
Short-term Debt	110,000		0		'	'
Long-term debt	2,214,705		2,214,350		'	'
Collateral finance facility	482,092		484,752		'	'
Estimate of Fair Value Measurement [Member]	'		'		'	'
Assets	'		'		'	'
Mortgage loans on real estate (net of valuation allowances)	2,654,439		2,489,721		'	'
Policy loans	1,250,635		1,244,469		'	'
Funds withheld at interest	6,377,951	[1]	6,207,342	[1]	'	'
Cash and cash equivalents	861,319	[2]	552,302	[2]	'	'
Short-term investments	23,894	[2]	27,823	[2]	'	'
Other invested assets	509,067	[2]	534,442	[2]	'	'
Accrued investment income	279,368		267,908		'	'
Liabilities	'		'		'	'
Interest-sensitive contract liabilities	9,818,666	[1]	9,989,514	[1]	'	'
Short-term Debt, Fair Value	110,000		'		'	'
Long-term Debt, Fair Value	2,438,495		'		'	'
Debt, Long-term and Short-term, Combined Amount	'		2,333,023		'	'
Collateral finance facility	377,403		374,984		'	'
Estimate of Fair Value Measurement [Member] | Fair Value Inputs Level 1 Member	'		'		'	'
Assets	'		'		'	'
Mortgage loans on real estate (net of valuation allowances)	0		0		'	'
Policy loans	0		0		'	'
Funds withheld at interest	0	[1]	0	[1]	'	'
Cash and cash equivalents	861,319	[2]	552,302	[2]	'	'
Short-term investments	23,894	[2]	27,823	[2]	'	'
Other invested assets	5,216	[2]	5,070	[2]	'	'
Accrued investment income	0		0		'	'
Liabilities	'		'		'	'
Interest-sensitive contract liabilities	0	[1]	0	[1]	'	'
Short-term Debt, Fair Value	0		'		'	'
Long-term Debt, Fair Value	0		'		'	'
Debt, Long-term and Short-term, Combined Amount	'		0		'	'
Collateral finance facility	0		0		'	'
Estimate of Fair Value Measurement [Member] | Fair Value Inputs Level 2 Member	'		'		'	'
Assets	'		'		'	'
Mortgage loans on real estate (net of valuation allowances)	0		0		'	'
Policy loans	1,250,635		1,244,469		'	'
Funds withheld at interest	0	[1]	0	[1]	'	'
Cash and cash equivalents	0	[2]	0	[2]	'	'
Short-term investments	0	[2]	0	[2]	'	'
Other invested assets	38,446	[2]	33,886	[2]	'	'
Accrued investment income	279,368		267,908		'	'
Liabilities	'		'		'	'
Interest-sensitive contract liabilities	0	[1]	0	[1]	'	'
Short-term Debt, Fair Value	110,000		'		'	'
Long-term Debt, Fair Value	0		'		'	'
Debt, Long-term and Short-term, Combined Amount	'		0		'	'
Collateral finance facility	0		0		'	'
Estimate of Fair Value Measurement [Member] | Fair Value Inputs Level 3 Member	'		'		'	'
Assets	'		'		'	'
Mortgage loans on real estate (net of valuation allowances)	2,654,439		2,489,721		'	'
Policy loans	0		0		'	'
Funds withheld at interest	6,377,951	[1]	6,207,342	[1]	'	'
Cash and cash equivalents	0	[2]	0	[2]	'	'
Short-term investments	0	[2]	0	[2]	'	'
Other invested assets	465,405	[2]	495,486	[2]	'	'
Accrued investment income	0		0		'	'
Liabilities	'		'		'	'
Interest-sensitive contract liabilities	9,818,666	[1]	9,989,514	[1]	'	'
Short-term Debt, Fair Value	0		'		'	'
Long-term Debt, Fair Value	2,438,495		'		'	'
Debt, Long-term and Short-term, Combined Amount	'		2,333,023		'	'
Collateral finance facility	377,403		374,984		'	'
Reported Value Measurement [Member]	'		'		'	'
Assets	'		'		'	'
Mortgage loans on real estate (net of valuation allowances)	2,555,800		2,486,680		'	'
Policy loans	1,250,635		1,244,469		'	'
Funds withheld at interest	5,958,657	[1]	5,948,374	[1]	'	'
Cash and cash equivalents	861,319	[2]	552,302	[2]	'	'
Short-term investments	23,894	[2]	27,823	[2]	'	'
Other invested assets	460,905	[2]	491,545	[2]	'	'
Accrued investment income	279,368		267,908		'	'
Liabilities	'		'		'	'
Interest-sensitive contract liabilities	9,890,923	[1]	10,228,120	[1]	'	'
Short-term Debt	110,000		'		'	'
Long-term debt	2,214,705		'		'	'
Debt, Long-term and Short-term, Combined Amount	'		2,214,350		'	'
Collateral finance facility	$482,092		$484,752		'	'
[1]	Carrying values presented herein differ from those presented in the condensed consolidated balance sheets because certain items within the respective financial statement caption are embedded derivatives and are measured at fair value on a recurring basis.
[2]	Carrying values presented herein differ from those presented in the condensed consolidated balance sheets because certain items within the respective financial statement caption are measured at fair value on a recurring basis.

Fair_Value_of_Assets_and_Liabi8

Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Narrative) (Details)	Jun. 30, 2014	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'	'
Percentage Of Fixed Maturity Securities Classified As Level 3	9.10%	10.20%

Segment_Information_Total_Reve

Segment Information (Total Revenues of Reportable Segments) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting, Revenue Reconciling Item [Line Items]	'	'	'	'
Revenues	$2,833,020	$2,590,642	$5,490,193	$5,191,744
US Traditional Segment Reporting Information [Member]	'	'	'	'
Segment Reporting, Revenue Reconciling Item [Line Items]	'	'	'	'
Revenues	1,333,027	1,275,331	2,611,719	2,472,255
US Non-Traditional Segment Reporting Information [Member]	'	'	'	'
Segment Reporting, Revenue Reconciling Item [Line Items]	'	'	'	'
Revenues	293,448	301,991	582,069	616,091
Canada Segment Reporting Information [Member]	'	'	'	'
Segment Reporting, Revenue Reconciling Item [Line Items]	'	'	'	'
Revenues	309,113	295,325	586,862	592,414
EMEA [Member]	'	'	'	'
Segment Reporting, Revenue Reconciling Item [Line Items]	'	'	'	'
Revenues	391,318	310,169	757,175	617,756
Asia Pacific [Member]	'	'	'	'
Segment Reporting, Revenue Reconciling Item [Line Items]	'	'	'	'
Revenues	483,171	383,978	898,200	793,829
Corporate and Other [Member]	'	'	'	'
Segment Reporting, Revenue Reconciling Item [Line Items]	'	'	'	'
Revenues	$22,943	$23,848	$54,168	$99,399

Segment_Information_Income_Los

Segment Information (Income Loss Before Provision for Income Tax of Reportable Segments) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'	'	'	'
Income Loss From Continuing Operations Before Provision For Income Tax Segment	$300,535	($74,758)	$499,975	$204,069
US Traditional Segment Reporting Information [Member]	'	'	'	'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'	'	'	'
Income Loss From Continuing Operations Before Provision For Income Tax Segment	93,988	90,213	144,960	169,756
US Non-Traditional Segment Reporting Information [Member]	'	'	'	'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'	'	'	'
Income Loss From Continuing Operations Before Provision For Income Tax Segment	95,474	80,996	178,598	178,560
Canada Segment Reporting Information [Member]	'	'	'	'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'	'	'	'
Income Loss From Continuing Operations Before Provision For Income Tax Segment	35,020	35,659	55,084	71,967
EMEA [Member]	'	'	'	'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'	'	'	'
Income Loss From Continuing Operations Before Provision For Income Tax Segment	61,322	11,949	76,527	22,912
Asia Pacific [Member]	'	'	'	'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'	'	'	'
Income Loss From Continuing Operations Before Provision For Income Tax Segment	34,928	-287,345	61,239	-269,103
Corporate and Other [Member]	'	'	'	'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'	'	'	'
Income Loss From Continuing Operations Before Provision For Income Tax Segment	($20,197)	($6,230)	($16,433)	$29,977

Segment_Information_Total_Asse

Segment Information (Total Assets of Reportable Segments) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Segment Reporting, Asset Reconciling Item [Line Items]	'	'
Assets	$43,171,051	$39,674,473
US Traditional Segment Reporting Information [Member]	'	'
Segment Reporting, Asset Reconciling Item [Line Items]	'	'
Assets	13,659,119	13,285,423
US Non-Traditional Segment Reporting Information [Member]	'	'
Segment Reporting, Asset Reconciling Item [Line Items]	'	'
Assets	11,706,053	11,716,908
Canada Segment Reporting Information [Member]	'	'
Segment Reporting, Asset Reconciling Item [Line Items]	'	'
Assets	4,074,727	4,103,730
EMEA [Member]	'	'
Segment Reporting, Asset Reconciling Item [Line Items]	'	'
Assets	4,407,325	2,230,568
Asia Pacific [Member]	'	'
Segment Reporting, Asset Reconciling Item [Line Items]	'	'
Assets	3,817,197	3,597,456
Corporate and Other [Member]	'	'
Segment Reporting, Asset Reconciling Item [Line Items]	'	'
Assets	$5,506,630	$4,740,388

Commitments_and_Contingent_Lia2

Commitments and Contingent Liabilities Commitments and Contingent Liabilities (Commitments to Fund Investments) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Limited Partner [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	$291.10	$239.50
Commercial Loan [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	61.6	4.6
Private Placement [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	14	22
Bank Loans [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	$57.80	$37

Commitments_and_Contingent_Lia3

Commitments and Contingent Liabilities (Credit Facility) (Details) (USD $)	6 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
Credit Facility One Hundred Million [Member]	'		'
Line Of Credit Facility [Line Items]	'		'
Facility Capacity	$100		'
Maturity Date	'June 2017		'
Amount Utilized	89	[1]	89.4	[1]
Basis Of Fees	'Fixed		'
Credit Facility Fifty Three Million [Member]	'		'
Line Of Credit Facility [Line Items]	'		'
Facility Capacity	88.2	[2]	'
Maturity Date	'November 2014		'
Amount Utilized	88.2	[1]	58.4	[1]
Basis Of Fees	'Fixed		'
Credit Facility 270 Million [Member]	'		'
Line Of Credit Facility [Line Items]	'		'
Facility Capacity	270		'
Maturity Date	'November 2017		'
Amount Utilized	270	[1]	270	[1]
Basis Of Fees	'Fixed		'
Credit Facility 120 Million [Member]	'		'
Line Of Credit Facility [Line Items]	'		'
Facility Capacity	120		'
Maturity Date	'May 2016		'
Amount Utilized	80	[1]	85.1	[1]
Basis Of Fees	'Fixed		'
Credit Facility 200 Million [Member]	'		'
Line Of Credit Facility [Line Items]	'		'
Facility Capacity	200		'
Maturity Date	'September 2019		'
Amount Utilized	200	[1]	200	[1]
Basis Of Fees	'Fixed		'
Credit Facility 850 Million [Member]	'		'
Line Of Credit Facility [Line Items]	'		'
Facility Capacity	850		'
Maturity Date	'December 2015		'
Amount Utilized	230.6	[1]	67.6	[1]
Basis Of Fees	'Senior unsecured long-term debt rating		'
Credit Facility One Hundred Fifty Million [Member]	'		'
Line Of Credit Facility [Line Items]	'		'
Facility Capacity	105.1	[2]	'
Maturity Date	'March 2019		'
Amount Utilized	105.1	[1]	132.5	[1]
Basis Of Fees	'Fixed		'
Credit Facility One Hundred Fifty Million [Member]	'		'
Line Of Credit Facility [Line Items]	'		'
Facility Capacity	150		'
Maturity Date	'June 2016		'
Amount Utilized	0	[1]	0	[1]
Basis Of Fees	'Fixed		'
Credit Facility Forty Seven Million [Member]	'		'
Line Of Credit Facility [Line Items]	'		'
Facility Capacity	0	[2]	'
Maturity Date	'May 2016		'
Amount Utilized	$0	[1]	$0	[1]
Basis Of Fees	'Fixed		'
[1]	Represents issued but undrawn letters of credit. There was no cash borrowed for the periods presented.
[2]	Foreign currency facility, U.S. dollar amount may vary.

Commitments_and_Contingent_Lia4

Commitments and Contingent Liabilities Commitments and Contingent Liabilities (Guarantees Issued) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Insurance Treaty Guarantee [Member]	'	'
Guarantor Obligations [Line Items]	'	'
Guarantor Obligations, Current Carrying Value	$966.90	$826.90
Insurance Treaty Guarantee Net Of Assets Held In Trust [Member]	'	'
Guarantor Obligations [Line Items]	'	'
Guarantor Obligations, Current Carrying Value	776.7	647.9
Guarantee Of Borrowed Securities [Member]	'	'
Guarantor Obligations [Line Items]	'	'
Guarantor Obligations, Current Carrying Value	187.7	93
Guarantee Of Lease Obligations [Member]	'	'
Guarantor Obligations [Line Items]	'	'
Guarantor Obligations, Current Carrying Value	$7.60	$8.30

Commitments_and_Contingent_Lia5

Commitments and Contingent Liabilities Commitments and Contingent Liabilities (Maximum Potential Obligation) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Commitment Period Two Thousand Twenty Six [Member]	'	'
Other Commitments [Line Items]	'	'
Guarantor Obligations, Maximum Exposure, Undiscounted	$500	$500
Commitment Period Two Thousand Thirty Three [Member]	'	'
Other Commitments [Line Items]	'	'
Guarantor Obligations, Maximum Exposure, Undiscounted	1,850	1,350
Commitment Period Two Thousand Thirty Four [Member]	'	'
Other Commitments [Line Items]	'	'
Guarantor Obligations, Maximum Exposure, Undiscounted	2,000	0
Commitment Period Two Thousand Thirty Six [Member]	'	'
Other Commitments [Line Items]	'	'
Guarantor Obligations, Maximum Exposure, Undiscounted	$1,250	$1,250

Commitments_and_Contingent_Lia6

Commitments and Contingent Liabilities (Narrative) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified	credit_facilities
Commitments And Contingent Liabilities [Line Items]	'	'
Undrawn outstanding letters of credit in favor of third parties	$212.50	$210.30
Undrawn outstanding letters of credit between subsidiaries	1,137.70	995.5
Number of credit facilities	9	'
Syndicated revolving credit facility capacity	850	'
Guarantee Of Subsidiary Collateral Financing [Member]	'	'
Commitments And Contingent Liabilities [Line Items]	'	'
Guarantor Obligations, Current Carrying Value	300	'
Letter of Credit [Member]	'	'
Commitments And Contingent Liabilities [Line Items]	'	'
Number of credit facilities	8	'
Facility Capacity	$1,080.50	'

Employee_Benefit_Plans_Defined

Employee Benefit Plans (Defined Benefit Plans Disclosure) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Pension Benefits	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Service cost	$2,489	$2,129	$3,990	$4,012
Interest cost	1,487	1,020	2,295	2,038
Expected return on plan assets	-1,302	-1,100	-2,235	-1,867
Amortization of prior service cost	216	213	218	307
Amortization of prior actuarial loss	245	782	918	1,619
Total	3,135	3,044	5,186	6,109
Other Benefits	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Service cost	470	410	940	820
Interest cost	339	311	677	623
Expected return on plan assets	0	0	0	0
Amortization of prior service cost	0	0	0	0
Amortization of prior actuarial loss	217	186	434	372
Total	$1,026	$907	$2,051	$1,815

Employee_Benefit_Plans_Narrati

Employee Benefit Plans (Narrative) (Details) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014
Compensation and Retirement Disclosure [Abstract]	'
Defined Benefit Plan, Contributions by Employer	$3.30
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year	$6.50

Equity_Based_Compensation_Narr

Equity Based Compensation (Narrative) (Details) (USD $)	6 Months Ended
In Millions, except Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'	'
Equity compensation expense	$6.40	$6
Stock appreciation rights granted	300,000	'
Stock appreciation rights granted, weighted average exercise price (per share)	$78.48	'
Performance contingent units	200,000	'
Shares Granted To Non Employee Directors	15,925	'
Options exercisable (shares)	1,900,000	'
Options exercisable, weighted average price (per share)	$50.82	'
Options, remaining term	'5 years 1 month	'
Compensation cost not yet recognized	$36.50	'
Period for recognition	'2 years 1 month	'

Retrocession_Arrangements_and_1

Retrocession Arrangements and Reinsurance Ceded Receivables (Narrative) (Details) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Effects of Reinsurance [Line Items]	'	'
Reinsurance ceded receivables	614,203,000	594,515,000
Reinsurance Claims Recoverables	155,100,000	134,100,000
Claims Recoverable From Retrocessionaires Past Due	7,400,000	4,200,000
Reinsurance Recoverables Ceded Credit Risk	367,300,000	359,200,000
Reinsurance Recoverables, Percentage of Total	59.80%	60.40%
AM Best, A- Rating [Member]	'	'
Effects of Reinsurance [Line Items]	'	'
Ceded Credit Risk, Disclosure	'“A- (excellent)”	'“A- (excellent)”

Stock_Transactions_Stock_Trans

Stock Transactions Stock Transactions (Narrative) (Details) (USD $)	3 Months Ended	6 Months Ended	3 Months Ended
In Millions, except Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2014	Mar. 31, 2014
			January 2013 Share Repurchase Authorization [Member]
Equity, Class of Treasury Stock [Line Items]	'	'	'
Treasury Stock, Shares, Acquired	818,515	'	1,449,293
Treasury Stock, Value, Acquired, Cost Method	$64.10	'	$112.60
Stock Repurchase Program, Authorized Amount	'	300	'
Stock Repurchase Program, Remaining Authorized Repurchase Amount	'	$123.30	'